OBVIOUSLY, this is a pretty exclusive instructable, as you'll need to live in a cold climate with plenty of snow for this to work. There was a little blizzard that had moved through Hamilton this past winter ('07) that gave me the material I needed to make this a reality. Having temperatures at 20 degrees and below at night helped as well, especially with freezing the table's top surface. Where you are geographically (and thus what type of snow you normally get) will impact the process involved in making the table as well; I'll explain more about different approaches to dealing with that factor later on in the instructable.
The instructions here for the top ice surface are based largely on Wisegeek's Introducing Table Hockey on Real Ice tutorial, which is definitely a good thing to check out in its own right. The snow base & cup moldings were modifications I made on my own design, as well as the fact that my final table doesn't have a piece of plywood wedged in it. :)
Ready to start playing beer pong like Eskimos? Bundle up, and let's get to it!