The CyanogenMod team has certainly been busy this week; a few days ago we saw the first CyanogenMod 9 nightly builds appear for the AT&T Galaxy S II and HP Touchpad, and now the original Samsung Galaxy S can join in the party, too.
[nightlies]
Nightlies are available for both the i9000 and the i9000B, which is the Brazilian variant of the device, from the CyanogenMod downloads site.
Update: Captivate and Vibrant too!
[main_primer]
[Sources: Galaxy S i9000, Galaxy S i9000b, Captivate, Vibrant]
Thanks, Rukku and Ryan!