iPhone aps, how I love thee

I'm trying out this new iPhone app to blog. For those of you without iPhones, how can you live without one? Here's a couple apps that might just convince you to take the plunge:

1) Cowbell - shake the phone, and cowbell sound comes out
2) iSaber - makes a lightsaber sound with associated lights
3) Magic 8 - when you turn the phone upside down and then rightside up it answers life's riddles for you.

I really have no idea how I got along before it...