There's no good place because there's no actual information about anything. The few sites who have reached out to publishers have got pretty noncommittal answers or none at all. I would be extremely skeptical of anyone who says that such-and-such a publisher is talking about patching their game, ergo it'll be patched.
Here are the GFWL games currently on sale on Steam:
Warhammer 40,000: Dawn of War II + Warhammer 40,000: Dawn of War II Chaos Rising * I believe this is going to be patched or has, but the situation for these games has never been clear to me.
There are also quite a few removed games; The Club, Stormrise, and... I wanna say at least one other SEGA game got removed this week. Bulletstorm. FUEL. Dirt 2. Fable III. No one knows if these games will get patched and re-added or not. I believe at least one of the racing games has a separate app, implying it'll be rereleased.