http://www.codefn42.com/chordz/index.html
 
This is a terrific app and would be a very welcome and useful addition to Sonar.  This free plugin works a bit oddly in Sonar (e.g. it is muted unless its gui is open), but it does what is advertised--it allows the user to trigger full chords by playing a single midi note.
 
Please consider it.
 
Thanks for the great work you are doing...
 
Gary McCoy
Woodstock GA
>20 years with Cakewalk

I would love this as well!!!
 

I was playing around with MIDI-based VST last night, actually.  Not this one, a different one (cable guys).  Key take-aways I found to get it working smoother in Sonar:
- Force enable the plugin as an instrument if it's being identified as an effect.
- Create an instrument track for the plugin.  Put your clips here.
- Wire the MIDI input of your target instrument to the MIDI VST instrument track output.
- Enable input echo on the target instrument track, but not in automatic mode (which turns off echo automatically when you click out of the track).
 
Does this one work with less hassle?  Having something like chordz integrated would be cool, but getting better (less hassle) VST MIDI support would be even better!