There's a lot of good ideas in this thread that I
won't be using.
That said I don't want to discourage ideas

The trees I'm building and the stuff I'm working on could also work for a more of a psi based or wilder martial artist that uses Chi or 'harmony with nature' as the theme. So maybe some day we'll see a hybrid that uses weapons, chi, or equilibrium. But the class I've started coding will only use stamina, unarmed attacks, and light armor. He'll focus on striking and grappling and play heavily on the intricacies of these two fighting styles. I'm also going back to my initial idea of combo points and finishing strikes (much like the diablo 2 assassin).
Here's the trees I've got basically finished.
Martial Arts - Contains the three style switching talents.
Bareknuckle Boxing - Strikes build combo points and deal more damage from striking stance.
Grappling - Grapples deal more damage from grappling stance.
Unarmed Training - Generic unarmed combat tree.
Conditioning - Constitution based generic tree.
And half coded/planned trees.
Tactical - Tactical advantages.
Finishers - Finishing moves, require combo points to execute and have greater effects the more combo points you have.
Kick Boxing (Advanced Tree) - Tree focused on kicks. These will build combo points, offer a new finisher at the top, and deal more damage from striking stance.
Throws (Advanced Tree) - Tree focused on throws. Offers a new finisher (that will let you throw a grappled mob like as an aoe attack

) and deals more damage from grappling stance.
The trees really only tell half the story though. With some help and ideas from the folks on IRC I've got a pretty intricate set of grappling functions worked up which will let the talents track who's grappled, only allow grapples to be maintained while striking if you're striking a target you're grappling, prevent you from grappling great wyrms (unless you inflate your size category

), let you seamlessly switch grapples (you can only grapple one enemy at a time), and deal extra damage with some attacks if you're grappling that target.
The striking code has some nice stuff in it as well like a few rush style talents that deal extra damage the further you travel. I think we'll get a lot of mileage out of a martial artist who's only using stamina
