IGN has a preview up of Universe at War, the upcoming real-time strategy game (and the first third party Games for Windows Live title) for PC and Xbox 360 from Sega. While the preview is of the the PC version of the game, they do bring up how progress on adapting the title for the 360 is going:

First things first, with the announcement that the Xbox 360 version of UaW would be cross-compatible with the PC version, we had plenty of questions...we have not seen the 360 version in action yet, but SEGA informed us that they had their first 360 controller victory over a PC player recently, which means they must be making progress on the control scheme. We're admittedly very interested, and a bit skeptical, in how successful the cross-platform play will be between PC and 360 players. After playing the PC version yesterday, it's safe to say that the game is not being dumbed down. It's a complex RTS with lots of units with various abilities and plenty of structure and unit upgrades that can be made. We're going to be pretty freaking impressed when we see these two control systems up and working together in a fair fight. In the meantime, we'll have to be content with playing only the PC version.