We've been seeing serious work on getting the GSM flavors of the Samsung Galaxy S line into the CyanogenMod 7 project for about three months, but now it's officially official -- the Samsung Vibrant, Samsung Captivate, and Samsung Galaxy S i9000 have been merged into the CM7 source tree. Nightlies are currently building, and should be ready for you to test TDR's bandwidth very shortly.
Note that these aren't general release builds. Nightly builds are prone to bugs, and best left for the advanced user. If that's you, get ready to check the CyanogenMod mirror network for your version's build.