In the theater:
UNDERWORLD: RISE OF THE LYCANS
MONSTERS VS. ALIENS
On DVD, my favorite discovery this year is SPIDER BABY, this bizarre black comedy from the 1960s. It's like the Addams Family, if the Addams Family actually killed and ate their visitors! It really has to be seen to be believed.
I'm looking forward to renting FROST/NIXON and LET THE RIGHT ONE IN as soon as I can take some time off from the book I'm working on right now.