There is light for the poor souls locked (literally) on a 1.1.2 OOB iPhone…
http://iphonejtag.blogspot.com/2008/01/112-otb-unlocked.html
The bad news is that so far the procedure looks a little complicated and there are chances that you might brick your phone during the process. I hope the process will be made smoother and easier. I expect lines in front of Apple Stores to buy the last 1.1.2 OTB… before the 1.1.3 OTB will start to flow on shelves…