Yeah. I downloaded the patch OK. Launcher asked me if I wanted to patch to 2.0. I said yes. Patch failed 3/4 of the way through. Corrupted the game. Now it looks like I have to reinstall the game. This sux.
EDIT (update): OK. I have been able to patch successfully. I *think* the game is running, but I can't tell for sure; I'm remoted into my home PC from work - trying to have Witcher 2 ready to play when I get home - and I think the remoting software balks at Witcher taking over the whole screen.
I manually patched successfully using the downloaded patch (thanks Bandred). The manually downloaded patch and the unsuccessful auto-downloaded patch were two *very* different sizes; manual = 929,241KB, auto = 762,176KB. Before I downloaded the patch, I tried manually patching by double-clicking on the auto-downloaded patch without any luck, so it seems to me that the auto-downloaded patch was borked on my machine. Maybe the full patch wasn't downloaded for some reason.
EDIT: (update): The patch was successful.