I've been thinking about the monk lately. I think I may have a solution to some of its woes. The drawback is that it favors unarmed strikes, and makes monk weapons seem like a waste(nevermind!).
The idea comes from the soulknife class. Every few levels it gets either a plus to hit and damage or a magical ability added to his mind blade.
Why don't we give tmonks the same thing? At 4th level and 4 thereafter they gain a +1 bonus to unarmed strikes (Actually to any monk weapon and make it an enhancement bonus so it doesn't stack with magic). Then, like a mix of ranger and soulknife give them things like improved crit, or any of the improved manuever feats, but only with monk weapons and unarmed strikes, only while in no armor or something.
Hmm?
If you do that, I'd also give them a class feature that allows them to treat their BAB + AB (attack bonus) as their qualifier for feats/PrCs that list +X BAB as a prerequisite.