Thanks for all the info guys.
first those Boss drum machines don't follow you, you have to follow them, but they have real cool built in effects for the guitar though.. You can program your songs on them, but then you're stuck to that thing. You can't like "Ok let's do one more chorus guys - come on sing it baby!!".
And doesn't those MiDI guitar thingys have long latency issues?
That MIDJAY can you plug your guitar in and it will interpret the audio from your guitar and make chords?
The thing that sparked this was I saw the Digitech Vocalist Live 2, which is great! You just plugin your guitar and sing, and it makes harmonies for you, you can play single notes, chords, soloes, fingerpickin' whatever and you get a harmony. I thought maybe some clever people had developed something similar for bass-lines.
Doc-Z