Here's a look at the elusive Nexus 7 docking station live and in color on Youtube. We don't have a lot of information here, just that the fellow posting the video bought it at Yodobashi Camera in the Akihabara district in Japan. He had the opportunity to buy it a day early, and like any of us would, he jumped on it.
It looks to be the same dock we saw in late November, utilizing the pogo pons for charging and audio. That dock is no longer "coming soon" on the Asus Japan site, but it is listed as out of stock. There is no listing on the ASUS America site or the Global site.
We're not sure of what the availability will be, or if it is even coming to the states. We assume that it will, as the demand for the Nexus 7 is still very high. The dock would make for a great holiday gift, so hopefully we see it offered very soon.