The confirmation came via Samsung UK's Twitter account, which says that "it's currently in development" and "will be released for all networks at the end of September." As we noted in our review of the Galaxy S Captivate, the device ships with Android 2.1, which means that some of the enhancements of the latest and greatest Android aren't available on the stellar handset.
Thus far, only the Google Nexus One has received an official OTA update to Android 2.2, although HTC and Motorola are also working on bringing 2.2 to the EVO 4G and Droid X, respectively.
In benchmarks, Froyo is significantly faster than prior Android builds and adds support for Adobe Flash Player 10.1. Considering how fast the Galaxy S is just on Android 2.1, we expect that it will absolutely scream under Froyo.
For those of you that just can't wait to have 2.2 on your Galaxy S devices, the custom ROM community is already hard at work and builds for the European/Asian Galaxy S devices are already starting to pop up. Be warned, these builds are incomplete and still very much in beta.
For everyone who is looking to an officially supported version of Froyo, we'll see you in September!