Recently, Google started selling the unlocked GSM variant of the Galaxy Nexus on the Play Store. Now, they have added some accessories to go along with it.
For now you only have three types of docks available. This includes a vehicle dock that can also charge your phone, a standard landscape desktop dock that uses pogo pins to connect to the connectors on the side of the Galaxy Nexus to charge it and a multimedia dock with an HDMI out that places the phone in a portrait mode and uses the USB port to connect.
The vehicle and the desktop docks are priced at $54 each and the multimedia dock is priced at $49. As with the Galaxy Nexus, the accessories will only be available to you if you live in the US. Also, these accessories only work with the GSM version of the Galaxy Nexus.