The iPhone 4 announcement is only hours old, but after a hands-on and poring through tons of Apple documents on the new device, we’ve found a bunch of new details that you probably didn’t already know from the unveiling. Without further delay, here’s the list—and there will be plenty more to add in the near future. Thanks to Charles Starrett for his assistance in compiling this list. 1. 802.11n, Limited. While iPhone 4 does…