I'd read this thread before and had nothing to add.
Tonight though I was working on a piece and decided to try just recording myself playing on my regular electric guitar the bass parts.
After playing /recording the bass line with my electric I added Waves Soundshifter and transposed it down an octave. For my bass amp via Amplitube 4 I tried out some of the Ampeg SVX 2 amps I had recently picked up.
It sounds really pretty nice in the mix. I was surprised how well it sounded. I'll be investigating this further.
Although I'm pretty motivated to try using MODO bass via the keyboard. It sure was easy to play it on the electric guitar though. No new skills involved.
P.S. The technique only worked for me on play back. Soundshifter introduces latency when tracking/recording, but none on playback.