Suess Landing is all jazzed up to look like Whoville. There are Grinch visits, special rides, sing-a-longs, etc. There is also the Macy's parade which I hear will be more improved this year. Anyone else?
Over at Disney in early December (can't remember the exact dates off hand) there is a big gathering of RADP types (for the newsgroup rec.arts.disney.parks). A lot of Universal fans attend that as well. I'll be there.