How do I uninstall an iPhone AppStore application?
Those of you who had previously jailbroken their iPhone and used either Installer or Cydia to install unofficial third party applications may have found no clear answer when wondering how to uninstall applications purchased or installed using Apple's new iPhone AppStore.
In the case of Installer or Cydia, applications are deleted or uninstalled from the package manger itself, by selecting the installed application and choosing uninstall. In the case of the AppStore, the equivalent is actually more intuitive, though it may seem otherwise to jailbreakers out there.
To uninstall an application purchased or otherwise installed from the iPhone AppStore, simply do the following:1) hold your finger on either the icon for the application you wish to uninstall or any other icon until the icons on your home screen begin to shake or wiggle (the same action you take to move or re-arrange home screen icons)
2) click the "x" in the upper left hand corner of the icon for the application you wish to remove
3) delete the application from your iTunes applications tab
If you want to re-install the application at a later time, simply visit the AppStore and select the application again.