I used Ruby to calculate which team will win Warcraft 3 matches (which people (not me) actually bet money on). It's short and simple. Maybe someone will find the code useful to adapt to calculate the odds of something else.
Blog entry:
http://www.curi.us/blog/2006/08/4k-vs-mym.html
Code:
http://curi.us/code/4k-vs-mym.html
-- Elliot Temple