Fans of Guster, or fans of unusual collectives, or fans of classic-rock covers, should check out
this series of videos. It's from a charity show by Yukon Kornelius, aka Adam from Guster, Ed from B.N.L., Stefan from D.M.B., and the drummer from N.E.R.D. (Guster needs to get some initials!), and features guest appearances from Jason Biggs and Dee Snider.
All of that is 100% true. And if that doesn't make you curious, the set list probably will.
[I should also say that Adam's guitar solos are sort of cracking me up, not because they're laughable - he's good! - but because I don't see him do much of the "wailin' on classic rock songs" thing.]