How about something minimalist--like a big ipod (It would have to be a gen3 though) on a grey-t-shirt (or grey or orange, if you wanted to do the lounge color scheme, heck, then you might sell twice as many) , with a now playing screen, with the battery level, just like the regular screen--
song title could be Ipodlounge, underneath it could be
www.ipodlounge.com, as album title; you could put something else in there as there are three lines if you're a purist (song/artist/album), and then underneath that 5 stars....
I have no graphic skills, so no fancy pictures, but I think that'd be kinda cool...
And if you really wanted to be abusive, you could put another ipod website on an ipod on the back, and give it one star....(Ok, just kidding on the last part).