The article I cited may be a couple months old, but government doesn't move very fast and I haven't seen anything else that specifically contradicts what it says about the government-backed "warranty commitment program".
Thanks for your article, but it is a mixed bag. To summarize, it says that GM currently intends for all warranties to be honored, but specific dealers may still decline warranty work. There is also nothing there in regards to the "warranty commitment program", so if GM changed their mind, then we don't know what would happen. I still think it's unlikely that GM/Saturn would renege on existing Saturn warranties, but during bankruptcy who knows.
I called my local Saturn dealer and they said they are still doing warranty service. To be safe, I think I will go over my vehicle with a fine toothed comb soon and take it in for any warranty issues while I know I still can.