IGN has an interview with both Bioware and Sega regarding the surprising announcement of a sonic RPG for the Nintendo DS. Other have said that Bioware is merely using the Sonic name to "test" its newly created DS division, which imho is a bunch of crap.

We couldn't resist throwing BioWare a few questions regarding the SEGA deal, the Sonic project, and its handheld division. Greg Zeschuk, President, and Ray Muzyka, CEO of BioWare Corp., were right there at the ready to tell us what we wanted to know -- at least, what they could say with the game so early in production. Sonic RPG is a 2008 release, after all. Sega of America President and COO Simon Jeffrey also chimes in with a few answers.

Read Full interview here