Me and Dave spent a few hours this morning soldering up one of these this morning as my Christmas present, and it's awesome! I love it!
It's basically a alarm clock soldering project that uses a retro Russian digital display tube (which aren't made anymore)... It's pretty awesome looking and it was fun to make
If anyone wants more in depth details and such,
http://www.ladyada.net/make/icetube/ is the place to go. If you want to make one, go for it... Just know they're on back order since they no longer make the tubes (they are coming from warehouses that are emptying their supply). It's really a neat kit.