My friend just so happened to run across a Megaman X fangame, and sent it to me. I played it and it's pretty damn good, imo. Theres alot of glitches with it though, especially with Sigma's first form. You can select either X or Zero as your starting character, getting more characters as you go on (X's team gets Protoman & Bass for some strange reason). If anyone wants to give it a try, here's the link:

http://www.stroutsink.com/mambo/inde...electcat&cat=1

Download the binary version, unzip it to a folder, and you're set.