For an oriental campagin a while back, I created a martial artist class too.
I think really though, it needs to be split into two catergories:
Wu Xia, and Swordsaint.
Wu Xia is the classic Chinese Knight of the Way (i.e. Crouching Tiger, most Jet Li movies) a repespected icon who rights wrongs done to the weak.
Swordsaint is the film bastardisation version of the Wu Xia, whose main inspiration comes from novels. Swordsaints have more amazing powers, a la Stormriders, Ruoni Kenshin (sorry, i dunno if i spelt that right) A Man named Hero etc.....
Anyway, basically I tihnk a Martial artist is a Fighter with the Monk's attack bonus, perhaps a AC bonus locked to Wisdom (DnD considers this the root of Ki/Qi/Chi, but I would have linked it with Charisma or even plain old Constitution) in a simliar way. However, the Martial Artist would have an open choice of feats resembling the fighters. He would, however, specialise in fighting onli with one weapon.
having no armor like the monk doesnot make up for getting the monks attack bonus, so the martial artist feats are slightly better than fighter feats.
A had a huge feat list, the link to which i will post when i get around to uploading it.
Tell me what u tihnk!