How much profit do bands make off of CD's?

I’ve been having a bit of a guilt trip lately about downloading music off of sites like Bittorrent or using Limewire. How much money do band’s actually make off of their CD’s? My issue is that I think that bands (mostly indie) which I listen to truly deserve to be compensated for their efforts, not their record companies. What’s the split between the record labels and the bands in terms of who gets what off of CD sales?

Someone once told me that the majority of a band’s income comes from playing live gigs? Can anyone confirm?