if its possible, i'd like only acoustic instruments if thats possible
here's what i got so far

"outside" Staind live f/Fred Durst
"bring me to life" evanesance (its a live radio performance)
"the blowers daughter" damien rice
"broken" seether
"to be with you mr big
"time of your life" green day
"hey hey what can i say" led zeppelin

"Times Like These" Foo Fighters

"Touch, Peel, and Stand" - Days of the New
"Brother" - Alice in Chains Unplugged
"Swing Life Away" - Rise Against
"Black" - Sevendust (off Southside-Doublewide)

jolene - ray lamontagne

Everlong is even better, and there is an acoustic version.

I was going to say either Nirvana or Alice in Chains unplugged.

Stone Temple Pilots - Plush (acoustic)

pearl jam mtv unplugged is classic if you can find it

the version of everlong from the howard stern show is great

Ben Harper, "The Drugs Don't Work" (live)

Letters to You - Finch
Firewater - Yellowcard
Memory - Sugarcult

The acoustic version of Foo Fighter's "Everlong" is one of the best acoustic performances I have ever heard, period. Absolutely incredible.

I'm sure they've done the song a few times -- the version I remember hearing was off of a radio show.

May I also recommend Radiohead (or rather Thom Yorke & Jonny Greenwood) doing "I Might Be Wrong" -- specifically, their performance on BBC Radio 1.

And others:

Beck - "Outcome" or "Forcefield"
Nick Drake - "Pink Moon"
Badly Drawn Boy - "Something to Talk About" or "Bewilderbeast"
Andrew Bird -"MX Missiles"
Turin Brakes - "Underdog (Save Me)"
a-ha - "Mary Ellen Makes the Moment Count"

Some of these have acoustic guitar but have other instruments and maybe some non-acoustic elements.

That's it for now.