If you were able to program the ultimate app, what would you have it do?

Transport me anywhere I want :) which would be more hardware related but maybe the iPhone will have transportation technology lol.

iSLAP is the name of my ultimate app | This would be an Add-On to FaceTime, Skype, or any Video Call/Chatroom application. Enter the UserID of the person to be SLAPPED, then submit. That UserID is then put on the iSLAP LIST with Reward/Bounty Amount. Nearby Users can be notified via SMS or eMail. Users get paid when the MARK is SLAPPED, less a nominal service fee. There's Bonus Money if you make the MARK cry and/or scream like a girly man -or- anything that makes people laugh on YouTube. Amount of bonus will be judged for Style, FORCE of SLAP, Creative Trash Talk, Etc.

I believe Apple has already made the ultimate app. It's called the App Store app, and it has everything you need there, and if you want to download an addin feature for your device, well that's done by an inapp purchase on the App Store.

The app would tell people how to cure every disease in the world. :D

Black Hat Where you can test the Wifi on how strong it is with a series of attacks. Then it would show you Where it needs to improve and the passwords of course.

iTux. A distribution of linux optimized for touchscreens, specifically that of the iPhone and iPad.

Make a wireless area network or a bluetooth personal area network with your friends also with iPhones and iPads and let you make a mesh pool of music and let you download from it.