I was just browsing the iPhone pages on Apple's site, talking about it with my brother, and on the Wireless Page you'll come across the following text:
Wireless iPhone uses quad-band GSM, the global standard for wireless communications. It also supports Cingular’s EDGE network, 802.11b/g Wi-Fi, and Bluetooth 2.0 with EDR, which links to Apple’s new, remarkably compact Bluetooth headset.
Looks like a sexy new headset is on the way from Apple... think they'll sue themselves?
I thought that was announced during the keynote, I remember seeing something of it. It was a perfectly rectangular piece that leaned against the back of your jaw. I'll se if I can find a pic...