Copy paste comes to iPhone.
Copy/Paste finally made it to the iPhone and iPod Touch jailbreak community. First Clippy was released, allowing real copy/paste for the first time after a year and a half of waiting. Shortly after, hClipboard and CopierciN were released, providing us with some great choices and discussion.
If you haven't jailbroken yet, copy/paste is as good a reason as any. Apple hasn't done it. AppStore developers aren't allowed to do it. Jailbreakers have it.