I was just browsing the GlobalScale website and found some interesting information and news.
U-Snap: As the news say, U-Snap will not longer be supported due to low customer demand and to keep the cost lower. It will only be available as "Customer Build" for high volume OEM customers.
GuruPlug Server Plus: It seems like that the GuruPlug Server Plus is not available any more: "GuruPlug-ServerPLUS is not available for on line purchase anymore as our inventory is 0-out". I guess this is the result of the new Dream Plug which was released recently. The Dream Plug is a further development of the GuruPlug Server Plus, but for a slightly higher price.