There were three themes and three picture packs released to Xbox Live Marketplace last night for Sonic The Hedgehog. The picture packs are 100 points each and the themes 120 points each and are available in all Xbox Live regions.

Picture Packs
Dr. Eggman Picture Pack
Soleanna Picture Pack
Memorial Sonic Picture Pack

Themes
Dr. Eggman's Theme
Soleanna's Theme
Memorial Sonic's Theme