The chip found is the Broadcom BCM4329FKUBG wireless chip which supports 802.11n.
This is a big deal, as even the iPhone 3GS doesn't support 802.11n. The iPhone 3GS has a BCM4325 wireless chip, which only supports 802.11 a/b/g. We don't know yet if 802.11n will be supported in software, but at least the hardware's there. There's also Bluetooth 2.1 + EDR and a FM receiver and transmitter packed into this chip. If they built in the antennas, and if Apple adds software support, you could theoretically stream music to your car stereo without any external hardware. But that's a lot of ifs.
iFixit was also able to find a spot which looks to be the location for a camera. It appears that Apple left in room for a camera in the top of the device. There is a 6mm x 6mm x 3mm space between the Broadcom chip and the wireless antenna. There isn't enough depth for an iPhone-style autofocus still camera, but just enough room for the camera that Apple used in the 5th generation iPod nano.