Samurai Shodown 5 Special wiki was started by Mauve
http://poverty.mizuumi.net/wiki/Samurai ... _5_Special
and currently is being filled (you can check the progress at Mauve's user page:
http://poverty.mizuumi.net/index.php/User:Mauve
Also check Mauve's article on introduction to SS5sp
http://mizuumi.net/2010/10/30/samurai-s ... roduction/