I just saw
this, and I don't know about you, but I definitely plan to use it in a game sometime... What a simple, flavorful, and pretty effective, solution to much of the "casters are overpowered" problem.
Edit: What about
these? I don't know if I'll use them (I'm pretty strapped for feats, and Luck feats greatly benefit me as a Nord's Blade), but I think they are a very cool idea. I think feats in general should be more powerful, and the +2 to 2 skills feats are some of the weakest ones in the game (and hence the most in need of power-ups).
Edit2: I kind of like the looks of
this as well.