The iPhone elite dev team says they've unlocked 1.1.2. Downloads are here on the Google code site. This is unconfirmed and untested as of right now, but if you just can't wait to get your 1.1.2 iPhone unlocked, there you go. Someone ping us in the comments below and let us know if it works for real.
Click here for the anysim 1.1.2 download
pf edit: as of yet the lockdownd issue is NOT resolved, so we do NOT have a SIM unlock for 1.1.2.