IF a leak hits it will probably be from samsung-firmwares. They already posted one 2.1 captivate leak and I am sure that as soon as they got a hold of 2.2 they will release it.
If Samsung can actually meet its deadline 2.2 will be out next month. I have also noticed that some of the fimwares leaked from samsung contain the carrier software. If Samsung is doing the carrier modifications for them it should be much quicker to ship than the typical vendor to carrier setup.
Have had Windows Mobile, Windows CE, Android & Windows Phone Handsets
Currently using a Nokia Lumia 920