Last good thing he was in that I saw was Multiplicity. A decent comedy if you ever happen to check it out.
White Noise... argh, that **** was terrible.
He's looking very old and saggy now.
Multiplicity was great. Very underrated.
I liked him in "Desperate Measures", though that movie's entire plot/execution fell a little thin.
He was also great in "The Last Time" which had a twist I didn't really see coming. Not a great movie either, but that's the thing I like about Keaton... he's good in every film he's in.