I am hopelessly addicted to Angry Birds on the iPhone. Thanks to Aprille, I blew my way through the free version and am working my way through the paid version. I just downloaded the Halloween version even though it's almost December. I have gone on to infect Aaron, Tina and my mom with the Angry Bird flu also.
I love all the spin offs from Angry Birds - check out this Angry Birds cake, a very cool ornithological illustration of the Angry Birds and this video of the Angry Birds/Pigs peace treaty (warning - the birds drop the f-bomb).
One of the things I like best are the stuffed Angry Birds and pigs that you can buy. What a great holiday gift!