Sounds promising. I don't really anticipate getting another update via AT&T (unless it locks something down). Still, I wouldn't mind running a Gingerbread rom for the i9000 - assuming minimal tradeoffs. I'm sure some of the great devs on this board will think about a port for the Captivate.
Of course, Samsung will make a lot of people happy if they release an official Captivate ROM via carriers in a timely manner. They could use some more happy customers.