Galaxy S 4G owners, the wait is finally over - Gingerbread is officially available for your device. Samsung threw a couple more fixes into the mix as well, like a Google security patch (vague, I know), camera enhancements, and Wi-Fi enhancements.
Unfortunately, this one won't be coming to your device over-the-air, so you'll have to install Kies Mini and grab the USB cable in order to pull it.
The entire process seems to be pretty cut-and-dried, so it should go off without a hitch. For full instructions, changelog, and other info, check out T-Mobile's Software Upgrade page.