The BrickForge Flickr stream has this post-BrickFair pic from the show. Titled 'Dixie Brix and the Studs', it showcases some of the new 2010 BrickForge product like the violins, acoustic guitars, drumsticks, and mohawk hair piece.
I'm really surprised how little effort TLG threw behind LEGO Rock Band. No minifigs, sets, or accessories to help promote the game at all. We do get an official microphone (that's not a Belville accessory) with the Series 2 Pop Star, but when will the Rocker with mohawk and electric guitar show up? I guess we will have to look to Series 3 of the Collectible Minifigures...
(Via BrickForge Flickr stream)