Everything 2nd Edition. Conversion is easy as pie, as i use only RL, GHK, FR and generic stuff atm.
Which brings me to the Point - no offense-  i dont want to derail the thread but,
      Conversion of the other 2nd ed Settings like DS and DL are still not resolved at all !
Not the simple mechanics but the crunch and fluff parts. (Psionics, Defiling, Dragonlance, Half Giant or Thrikreen race to Name the best examples.)