Couple of new ROMs for Samsung Captivate for AT&T have been leaked. Although unconfirmed if the new ROMs are beta ones or stable, the ROM will flash the Froyo-running Captivate to the latest Gingerbread OS (Android 2.3.3).
The builds UCKE3 and UCKF1 can be flashed via Odin and is available for download from Samfirmware.
It’s good that someone has managed to find the leaked versions of the Android 2.3.3 update, however I wish that they would officially update the phone.