St. Cuthbert help me but I've begun doing a hack of the Eldritch Wizardry psionics rules for Swords & Wizardry -- and it's not as bad as I thought it would be. I started it up on a lark, trying to see how easy it'd be and I soon found it wasn't that bad at all. I'm especially grateful to the D20 SRD, which has proven very useful in this little lark of a project. My feelings about 3e's complexity to the contrary, if you dig deeply into it, you'll find a lot of the game's OD&D/AD&D is buried under the surface, just waiting to be mined for old school projects. It's frankly amazing to me that WotC allowed so much of the Gygaxo-Arnesonian patrimony of the game to enter into public use through the OGL, but thank goodness for that.
If this gets anywhere, I'll probably just make a little PDF of the whole thing and make it a free download somewhere.