Game: http://unofficial-winmugen.jpn.org/
Some Gameplay: http://www.youtube.com/watch?v=h7CZXnCim3o
Links for Characters:
http://www.freewebs.com/mustkillroy/database.htm
http://randomselect.i-xcell
http://www.mugenguild.com
http://www.jsmugen.net/
http://www.freewebs.com/warner12/index.htm
http://www.infinitymugenteam.com
How To's:
http://www.youtube.com/watch?v=A82dK5zYrDY
http://www.youtube.com/watch?v=eXwqv5z0K0o
http://www.youtube.com/watch?v=51wUMt_SGYs
http://www.youtube.com/watch?v=z7TnHDRsT3s