This site says we already have Froyo, which we don't because it's for the international phones. I mean, let's say in the rare case, they are right, it's only for Froyo. I say just wait for the new ROM's, I think the people at XDA dumped the ROM for the Nexus S and will start making Gingerbread ROM's, so yeah.
Also, I'd just like to say to NOT believe in this. I wish I can compile up all these threads, starting with:
-Froyo Will come out in September with a GPS Fix, Froyo coming out in late September, Froyo coming out Oct 15th, Froyo coming out mid november, Froyo coming out early December, etc. I think there's a point where you just give up. It's like looking at the end of the world dates, and when you're like, 80, you realize that several "apocalypse" dates have passed by and you're still alive. Give up on Samsung, ROM's are the way to go (unless you're happy with Eclair).