what is your favorite facebook application?
So far, my favorite is the Farkel game. It is somewhat like Zahtzee with different rules and protocols, and it is cool to play live with an opponent.I also like the Zoo found in Birthday Cards. I have discussed the Zoo in detail in my article here: http://hubpages.com/hub/My-Trip-to-the-Zoo.
I like Fishville because I keep fish for real. It's fun!