First of all, great idea, ed!

I don't really have anything to contribute musically, given my comparatively minute guitar skills.

What I can suggest, as a bystander, is to take a look at the blues, and how they manage to have like 15 great guitarists playing one song for the solo section, each plays a solo in his turn, while the others play rhythm (sort of like the ending to "Blues Brothers 2000", with BB King, Eric Burdon, Clapton, and others).

Since this is Guitartricks, I don't think that it's a bad thing to have more guitar parts than vocal or other instruments.

I also think that it's a good idea to also break off into smaller groups, maybe 4 or 5 each, and each make up a song. Maybe they rest of us could even vote for our favourite song.

Again, great idea, ed, and I'm very interested in hearing the outcome!