putting a more youthful spin on this list to add to the already mentioned great older stuff O.o
dave matthews
#41 - this is a must imo.
www.howiefan.com has a really good tab for howie day's voicings. it's just a beautiful song regardless of the enigmatic lyrics.
lie in our graves- fun riff
(both from the album Crash)
radiohead is also great acoustic
creep
high and dry (the bends)
fake plastic trees (the bends)
coldplay is nice, though they tend towards non standard tuning which could prove difficult/not worth it for an acoustic set
Toto
Africa- you can actually tease this out of the #41 chorus (Em Cadd9 G D)
Better than Ezra
At the Stars
Live Again
Ryan Adams
Wonderwall (amazing cover, far far better than the original)
Howie Day
all his early stuff was acoustic and live
John Mayer
anything by this man is pretty solid imo
Also a neat trick is Am F C G and you can play the same thing and sing at least 5 songs to it. off the top of my head theres
Save Tonight
Machinehead
What if God was One of Us?
All for You- sister hazel?
Demons-guster
Either way-guster
My Stupid Mouth- John mayer
and the list goes on
btw, when are you playing and where? i might be in town.