Well, I suppose I'll start with something that I consider useful. I just finished work on an Ice Tray that anyone can use, should the need for ice arise. I like to build out of ice sometimes, and it can make a nice replacement for glass if you don't mind messing around with lighting. My redstone skills are crude, so I apologize for that. There are probably more efficient ways to set the redstone, but regardless, I'm proud of my work, however juvenile.
You can find the tray marked on the Live Map, in the Taiga right across from my place on the road to Nek's farm. If you're not interested in farming the ice I've set up a few chests I'll try to keep stocked with ice, and where anyone who uses the tray can put any extra ice they may not want. Chests are located under the large cocktail glass.
If you don't know how it works, instructions have been provided, and should any problems arise, there is an attendant there to serve your needs and sort out any malfunction.
A few pictures behind spoiler tags for your spatial consideration.