Additionally, I think that TET has ALMOST confirmed that Carmageddon 2 will be released on GOG, but it's not ready yet:
Hm. Certainly sounds like they'd like to release it (who wouldn't? :P), don't know if that's really a confirmation that they're already working on it though. I think Stainless Games would have to write something about plans to release it on GOG to make it count.