This software can perhaps be best summed up with the phrase, "Jam Origin MIDI Guitar, where have you been all my life?!"
 
If you're like me and play the keyboard like somebody wearing boxing gloves, but can knock out a tune cleanly enough on a guitar, then this could be what you've been looking for.
 
Guitar-to-MIDI converters and MIDI controllers in a guitar-like shape have been around for some time, but have never been that good or affordable for me to take the plunge.  As Roland products are a complete non-starter for me, I'd recently narrowed the field down to the following:
 
1. Fishman Tripleplay Wireless Guitar Midi Controller
 
Bolt a slab of tech to your guitar, incorporating a hexaphonic pickup and wifi transmitter which talks to a USB dongle presenting a MIDI interface on your computer.  Polyphonic, works very well by all accounts but not cheap (£319 is the best price I've seen in the UK).

2. You Rock Guitar YRG-1000 Gen2
Guitar-shaped MIDI controller, originally a kickstarter project I believe.  £174.94 on Amazon.  Polyphonic, very low latency (no waveform analysis required), some issues with hammer on/off, pitch bending and muting, but the reviews I've read are good and the device does its job very well by all accounts.
 
3. Jam Origin MIDI Guitar
A fully functional demo is available, so I installed it and gave it a spin last night.  Then I immediately bought it.  The tracking is very fast and accurate, and this is with default out-of-the-box settings; the software can be taught what your notes sound like for even better tracking accuracy.  It's polyphonic, and can be run stand-alone or as a VST plugin.  Best of all, it's cheap, circa £65 in the UK (but bear in mind that the government slaps VAT on top of that).  Still, by far the cheapest solution, with no altering of existing guitars or the addition of guitar-shaped objects taking up space in your home involved.  32-bit and 64-bit flavours are available for both the stand-alone app and the VST plugin.
 
http://jamorigin.com/products/midi-guitar/
 
 
 
 

This is a very cool concept/useage for us guitarists and there's a few in here that's been following the developement of this since it's beta release. Very nice to have your favorite synth being played through a fretboard. I haven't seen any updates for this since the final version was released (about 6 months ago?), but I have no complaints either. Good stuff here!!! 

I've been meaning to try this for awhile, it looks like it's maturing since this thread:
 
http://forum.cakewalk.com/MidiGuitar-Software-m2749780.aspx
 
Rocky

bluzdog
I've been meaning to try this for awhile, it looks like it's maturing since this thread:
 
http://forum.cakewalk.com/MidiGuitar-Software-m2749780.aspx
 
Rocky

I think it's come a long way and the developer listened/implemented to a lot of the user/tester requests over at KVR. The only thing I wish it could do better is in picking up on the faster playing solo's, but at the same time, your playing technique has to adapt a bit to the synth/instrument you're playing.
Like Ston stated in the OP, this being polyphonic is a HUGE plus.....really nice to play chords (using synth pads ot whatever) on the guitar than using "boxing gloves" on a keyboard.

Exactly right, your playing needs to adapt to the instrument you're controlling.  Also, I found myself playing completely different lines to what I might usually play on the guitar.  I've ordered a little hold pedal which I'm hoping to use with evolving pads, arpeggiated patches and the like (you can hold down a keyboard key indefinitely, but a guitar doesn't have infinite sustain).
 
There is quite a good monophonic-only box out there which is even cheaper and a nice 'n' tidy solution, which is the Sonuus G2M.  Looks like it's about the size of a very chunky 9V battery.  Guitar in one end, 5-pin MIDI out the other.
 
 

I wonder if Sonuus are going to bring out something new. They had a major sale of the G2M and i2M recently. Think it's still on from a few vendors. Certainly the i2M is half it's starting price.

How is that Sonus when soloing? (hammer-ons etc...)

I love Jam. Works very well. That's how I input notes into Finale.  Be sure to turn off Finale's playback as that's what causes so much latency. Plus, you don't really need the playback to enter notes since you're hearing your guitar anyway. It's a much faster entry system than keyboard for me.

ston
This software can perhaps be best summed up with the phrase, "Jam Origin MIDI Guitar, where have you been all my life?!"
 
If you're like me and play the keyboard like somebody wearing boxing gloves, but can knock out a tune cleanly enough on a guitar, then this could be what you've been looking for.
 
Guitar-to-MIDI converters and MIDI controllers in a guitar-like shape have been around for some time, but have never been that good or affordable for me to take the plunge.  As Roland products are a complete non-starter for me, I'd recently narrowed the field down to the following:
 
1. Fishman Tripleplay Wireless Guitar Midi Controller
 
Bolt a slab of tech to your guitar, incorporating a hexaphonic pickup and wifi transmitter which talks to a USB dongle presenting a MIDI interface on your computer.  Polyphonic, works very well by all accounts but not cheap (£319 is the best price I've seen in the UK).

2. You Rock Guitar YRG-1000 Gen2
Guitar-shaped MIDI controller, originally a kickstarter project I believe.  £174.94 on Amazon.  Polyphonic, very low latency (no waveform analysis required), some issues with hammer on/off, pitch bending and muting, but the reviews I've read are good and the device does its job very well by all accounts.
 
3. Jam Origin MIDI Guitar
A fully functional demo is available, so I installed it and gave it a spin last night.  Then I immediately bought it.  The tracking is very fast and accurate, and this is with default out-of-the-box settings; the software can be taught what your notes sound like for even better tracking accuracy.  It's polyphonic, and can be run stand-alone or as a VST plugin.  Best of all, it's cheap, circa £65 in the UK (but bear in mind that the government slaps VAT on top of that).  Still, by far the cheapest solution, with no altering of existing guitars or the addition of guitar-shaped objects taking up space in your home involved.  32-bit and 64-bit flavours are available for both the stand-alone app and the VST plugin.
 
http://jamorigin.com/products/midi-guitar/
 
 
 
 

I downloaded the trial and I too am blown away. It works well at 64 samples on my rig. I'm paying for the license. Thanks for the heads up. Does anyone want to buy a YRG? I much rather work midi with a real guitar and now I can.
 
Rocky

I will have to try this. I bought a You Rock Guitar last week - boxed it back up for RMA after about an hour with it.
 
I've tried the Sonuus, the Roland GK-2A pickup system... Man, I wish someone would get guitar midi right!