This is starting to get ridiculous. We're drowning in a sea of antennas. These little guys live on the top and bottom right corners of the device, and are probably really important.
Teardown Update: We have it on good word that the left green doohickey is the GPS antenna, while the right green doohickey is the Wi-Fi antenna.
With a few turns of our trusty Phillips #00 screwdriver, we free two antenna boards from the Tango.