Which comedian wrote an anonymous, bitchy letter to Rolling Stone?

• Joe Rogan, because after surviving Fear Factor, Jann Wenner's wrath isn't that scary.

• Dane Cook, distracting everyone from the disaster that is 'My Best Friend's Girl'

• Sarah Silverman, passing on the pain of breaking up with Kimmel

• Mitch Hedberg, producing more then new albums from beyond the grave