I am not aware of anything in the works that resembles this.
I believe this was just a booth at a trade show or the like that was displaying StreetDeck. StreetDeck is software, not hardware. This is not a "StreetDeck UMPC holder", but rather a card that tells you what the product is that just happens to have the StreetDeck logo on the bottom of it.
The cup holder was a prototype product MP3Car made for Intel for a trade show to showcase how StreetDeck could be used on a UMPC.
There were several practical issues that keep it short of a real product and it would take alot more design and testing to make it into one. It was made simply as a reference design for other manufacturers to make. There are now several UMPC mounts available by ram mount and other manufacturers although none that I know of use the cup holder. MP3Car has no plans to manufactur this or similar UMPC mount at this time.