My meaning by that is that the recent release and what I would assume to be solid interest in Rez HD for XBLA should show Sega that there's an interest from us gamers in some of their older catalog titles that might've gone unnoticed by many gamers looking for something different.
With this idea in mind, I offer this suggestion would make an excellent candidate to be revived from the Dreamcast counterpart and revisited on XBLA.
Chu Chu Rocket is essentially a Pipe Dreams style game that has mice on a non-stop beeline from Point A to Point B. It's up to you to redirect that path to guide the mice to safety and avoid losing any mice to the cats which are strategically placed around the level.
Given that the XBLA has some rather unique and fun "party" style arcade games on the service, such as Bomberman and Worms, I think that Chu Chu Rocket would make an excellent candidate for an eventual release.
Additionally, this video should prove how bat-shit insane multiplayer would be and why we need this on XBL.