If you've got a Samsung Galaxy S on C Spire (nee Cellular South), word is you've got an Android 2.3 update waiting for you via the Kies desktop program. Along with the Gingerbread UI and other usual changes, C Spire's also touting:
Improved battery performance
Improved IMAP/POP3 e-mail performance
Improved account and contact sync performance (like Facebook)
MMS size increased from 512KB to 1MB
Shame you still have to use Kies to update, but, hey, a Gingerbread update is a Gingerbread update, right?