When the iPhone 3G came out a few weeks ago, along with it came the new 2.0 firmware that brought many new features, including the coveted application store. Unfortunately, with the update came a pile of bugs, including problems with the GPS unit, and a completely unresponsive user interface.
The good news is that the new 2.1 firmware is due to be released any day now. Hopefully that will bring a pile of fixes and make the iPhone 3G usable. Right now there are random crashes, and a sluggishness in the UI that makes the device extremely hard to use.
If any of you have had any problems with your device, drop me a comment.