How will Xbox Live work on Windows Phone 7?
C|Net | at | by Mike
What we saw in Microsoft's demo Monday fleshes that concept out a bit. There will be a Spotlight section, with your Xbox Live avatar and notice of friends' achievements. And of course, there will be games--"premium titles" with achievements and multiplayer connected to other cell phones, PCs, and Xbox 360 consoles.
Don't let the simple interface fool you. Xbox Live on a phone is more than having your avatar on one more screen because of the three types of games I believe we'll see on Windows Phone 7.