So I spent the last week implementing the Game of Life (Milton Bradley, not Conway) in Perl. That was pretty fun. See Life@WPI, for the end result of my efforts, and those of the others who worked on it getting the graphics and design together. The rules are a bit different, and you have to actually play for the "computer" players, but it's pretty impressive for being mostly written in about 48 hours of solid coding this weekend!
The sidebar CGI that does most of the work came out to a shade over 800 lines of code, for 28.5k of filesize. It's horribly non-modular, linear, and hack-ish. But it works, and it hasn't quite brought the web server to it's knees yet!