the Degrees Of Separation between 2 WiKi pages, whether in the same wiki or not.

Everything Is A Graph - count the shortest number of jumps to get from one page to another

find the

*shortest*path is a Traveling Salesman Problem (TravelingSalesmanProblem)

While you could think of every WikiWord as being a CateGory, you could also select a small set of WikiWord-s as CateGory names, and assign every other WikiWord to one of those categories based on its WikiDistance. (If you felt the need to mimic the WebLog category pattern.)

A WikiHack