Engadget has been digging through the FCC site (headache) and discovered the Nexus One, aka the Google Phone, has been approved by the FCC. After reviewing all the documents, they believe the phone will launch with HSPA 900/1700/2100. These are the same bands that T-Mobile uses in all their 3G phones and confirms the TmoNews report that T-Mobile will be a launch partner for the device.
Early rumors suggested the device might include AT&T 3G, but no evidence has supported that yet. Looking back at earlier Google supported phones (ADP1 and ADP2), AT&T 3G has never been supported. The phones will work on their GSM network and receive an EDGE connection, but no high speed data is possible.
Google has also made no official statements on if and how the device will be sold. I expect we could see it appear on the Android developers site as the ADP3. We also believe without a doubt that the device will be fully embraced by T-Mobile.
Finally, several new pictures were posted to Engadget that reveal a new homescreen. The app drawer tab has been replaced by a 3D cube that launches a preview of up to five desktops. We can also see the phone is running the new Android 2.1 and includes Google Navigation. Note the lack of HTC branding anywhere on the device.