nope If you so choose, you have the option to pay more than $3.99 for the soundtrack if you're feeling generous, but that's really up to you. The album is available in MP3 320K, FLAC, MP3 VBR, AAC, Ogg Vorbis, and ALAC.
A special edition of the album will be released in late November. The only special feature announced thus far is its ability to exist physically in the tangible world. The entire album can be streamed from the website if you're curious about the game's soundtrack, which is certifiably awesome.
Super Meat Boy is currently available on Xbox Live Arcade, but will be coming to PC and WiiWare next month.