Jailbreaking is anything but pointless, sounds like you're just uneducated in the subject, google this list of things and tell me it's not worth jailbreaking
[CENSORED] - every app from the apple app store for free
Infinidock- add apps to the dock and scroll sideways
Mywi- turn your phone into a ...

Hey man just FYI apple is giving away free cases at apple stores for iPhone 4 owners but since you bought one they will refund your money.