The step, a prestige class.

[Tonguez]

Okay heres essentially what the Step gets

Quick Step (Ex): Move +5/+10/+15
Mobility: Mobility bonus feat
Uncanny Dodge: /Improved Uncanny Dodge:
Improved Run: run at 6x their speed
Unnatural Speed (Su): additional movement action per round

Essentially six feats that make him mobile in combat, great for a monk going wuxia (except for the BAb of course)

Its needs more

Fast Acrobatics is a cool suggestion and aids the Wuxia look

I'd add

Up the Walls - can run up a vertical surface
Acrobatic Charge - as per Duelist charge over difficult terrain
Fast Acrobatics - can tumble at full speed
Tireless Run - can Hustle or make a Forced March without suffering ill effects (damage) however if the fail the save on a forced march they will still become fatigued
Overland Stride - can move at full speed over any natural terrain
Great Leap +10 bonus to Jump (for leaping those pits and trenches)
Stealthy Run - can Hide whilst moving at full speed



Quick Step (Ex): Move +5/+10/+15
Mobility: Mobility bonus feat
Uncanny Dodge: /Improved Uncanny Dodge:
Improved Run: run at 6x their speed
Unnatural Speed (Su): additional movement action per round

 

[Land Outcast]

speed of thought? psionic?

 

[Tonguez]

speed of thought? psionic?

Yep a Psionic Feat it gives a +10 insight bonus to speed

 

[Vargo]

I would handle the requirement a slightly different way - make it "must have movement equal to racial base speed + x" where x currently equals 20, but whatever value you want to put it at. That way you can have Dwarven and small-sized runners just as easily, and you don't have a large number of centaur runners...