Then again, I was asking my husband today whether he'd ever consider doing a cover of a song rather than writing original tracks. I thought, if I was an artist, I'd be kind of flattered if another band thought my music was worth singing & recording (plus it'd give my material extra exposure too). He said yes at first and then said that it actually causes all sorts of headaches though because of copyrights and permissions, royalties etc etc.
Shame, cos I reckon if bands did that more often it could be mutually beneficial (as long as it was hilighted it was a cover and clear recognition was given to the original band)