I have started working on some new classes for S&W White box, the first up is the Duelist. This is a modified class based on my Kensei for Ruins & Ronin. The big difference was to drop the A.C. bonus of the Kensei and to allow the use of Leather armor.
You can download the duelist here, or on the side bar to the right.
Here are some other sub-classes I am thinking of creating:
Archer (or maybe a hunter class)
Assassin (this may be a combination of magic-using fighter - as I am thinking of a class more like the Faceless men of Westeros).
Legionary (Roman based fighter or a Hoplite)
Charioteer (you can see where I am going with this, I am sure)
Not sure if these sub classes are needed, so some may be dropped along the way...