Slash has his own. Dan Ackroyd's comes in a clear bottle shaped like a skull (pictured). Even Chopin has is own, fer crissakes (although he probably doesn't make any money from it.)
There's more, too. P. Diddy (or whatever) has an interest in Ciroc. And let's not even start talking about tequila (Sammy Hagar, Justin Timberlake, Turtle from Entourage).
The latest rock'n'booze partnership involves the Hard Rock Cafe. I have no idea if it's any good--I haven't tried it yet, but I am a major vodka connoisseur, so I'll be searching for it) and I have no idea if it'll sell. But it'll looking interesting sitting on the counter at the next party.