As you can see from the images, the dock will be able to hold the NT both in landscape and portrait mode. The N-Station is expected to ship in late February.
But I did find one bit of info that hasn't been posted elsewhere. ReaderDock is also working on a similar dock for the Kindle Fire. It's planned to come out shortly after the N-Station and it should work pretty much the same way.
You know, I'm not sold on the idea of a docking station for the KF or NT. I'm not the type of person to put a tablet down and let it continue to run. But I suspect I'm in the minority here. In fact, all you need to do is look at the multitude of iPod docks to know that there's a market for media docks.
I've been promised a review unit, and by the time it arrives I should have a NookColor to use it with. I'll let you know what I think.