I got calls and made calls without dropping.
I GOT CALLS AND MADE CALLS WITHOUT DROPPING.

The new antenna layout seems to be what it was billed as .
The camera looks great. The quality of photos is superb and with the "touch to focus" part of iOS5 it's pretty sweet.
Haven't had much chance to play with Siri yet, however as soon as I get the phone alive in the Apple store I asked her, "Siri, where am I?" Pinpointed my location on a map perfectly.
Downside: Some part of iCloud backup or iOS5 or whatever made it so that my backups won't go to the new phone. Had to start from scratch. This is not entirely horrible, since I'd be copying boatloads of songs etc anyway - but redoing my app folders is a bit of a drag.
iOS5 shutter button (volume up) is the bomb.
More as I work through it.