Birthday gift from the 'rents

So my big surprise (that AT&T ruined the surprise part partially) that my parents got me was an iPhone 4!! I love it so much. I am the last person in the family to be able to play Words with Friends on my own device! Before, I would just help Mom.

I'm looking for some apps that people find fun, useful, amusing!
Here's what I've got so far:

Plants vs. Zombies (game)

Angry Birds (game)

Cut the Rope (game)

Words with Friends (game)

The Weather Channel (tool)

Pandora Radio (entertainment)

Ringtone maker (tool)

Twitter (social)

Facebook (social)

Any suggestions??

-Annie

p.s.- THANK YOU MOM AND DAD!!!!! :]