I just got some DVDs a while back that I think a lot of people would enjoy. The big one is the newest adaptation of a Terry Pratchett book: Going Postal.
It's a great movie. Very funny. Very thought provoking. Rent or buy, it's worth it.
Others:
Not available through Amazon.Com but well worth going to specialty websites like Arkham Bazaar:
The Last Lovecraft: The Cthulhu Relic.
Die Farbe ( == Color in German == ) based on The Color Out of Space.
The Whisperer in Darkness based upon the novella of the same name.
Spooky Spooky, Scary Scary. Based on fruitcakes as best as I can see. (it's really short, funny and weird).
And finally, a nutty one that doesn't really fit anywhere:
The Lost Skeleton of Caldera. Beautifully done salute to 50s B horror and sf films. Very funny.
Take a look at Arkham Bazaar. They've got quite a few interesting things there, including some really great T-Shirts. I ordered a couple more movies that they had that I'd never seen before and I'm waiting on them.
They've also got some funny stickers and shirts, including one T-Shirt that advertises the Esoteric Order of Dagon, Changing Lives One Gill at a Time.