Thanks for asking! Yes, unfortunately, we’re currently out of stock for a refresh.
Several hundred additional units are in transit to Amazon. We expect them to be in stock this Wednesday (the 26th). These updated units are the same hardware-wise, but have a driver CD that’s been updated with DisplayLink 5.5 M1 drivers for Windows and 1.6b3 drivers for Mac to get all the latest features and fixes for users that install off the CD (we still recommend relying on Windows Update or going online to get the latest drivers).
If you’re in a hurry, you can also get the http://plugable.com/products/ut-1/ today - it’s the same hardware platform, with supporting materials for use as a terminal. But it will work as a laptop dock just the same.
Hope that helps. Again, thanks for your interest!