via pdroms

TimeCapsule is a 3rd party application for iPhone and iPod Touch. It can keep multiple states of a particular program by saving its preferences/settings/databases. These states are restorable. Currently, the TimeCapsule only supports backup/restore of the following apps:

AddressBookís contacts
Call History
Installerís sources
Mapís bookmarks & history
Mapís caches (not tested)
Notes
Safariís bookmarks & history
YouTube Video Cache
SMS
Transitís Preferences
Stocks
VoiceMail
Weather
WorldClock http://databinge.com/blog/