Samsung Vibrant (Galaxy S)
go to Youtube and search for Axura 2.2.7 by Devs4Android.
This video won't show you how to load the ROM, but will give you an idea of what the Vibrant can do with a 2.2 ROM. Once you've seen how much better the phone is I think you may be more likely to quit waiting for the official update.
I have been running back and forth between Nero and Axura ROMs for a few months and finally put it on my wife's phone too. We're both happy now and don't think we'll even go to an official update (if it does ever come out.)