This is starting to sound redundant, but Apple has released a new version of the iPhone operating system, 2.0.2. The update is intended to fix bugs, mostly lag issues. According to users and Wired's Gadget Lab testers, the lag issues in the address book have been fixed, text messaging is faster and more responsive, emails delete faster and backup is faster. There seems to be some discussion whether the 3G connectivity has improved or not. And, reportedly jailbreak apps are removed by the update.
And check out the telescope gadget for iPhone below. By clicking it on, you get 6x zoom - not too bad. While it may not be the most practical gadget in the world, it could be fun. And it comes with a plastic case that the telescope snaps connects to. At $20, it seems like a bargain.