iPhone4 - What does this mean for my kitchen?

We've finally taken the plunge...we acquired our new iPhone4s last week and I've been playing around non-stop. Home cooks, tell me--what apps should I acquire on my new toy to help me out in the kitchen? So far I have:

• Zagat guide (not so much for home cooking, but for when I don't feel like cooking at home!)
• Whole Food recipe finder
• Foursquare and Urbanspoon (again for eating out...)

Any suggestions for some must-have apps for the home cook?