Samsung Galaxy S, Samsung Captivate and Samsung Vibrant have all graduated to have Cyanogen (MOD) support. The Samsung i9000, T-Mobile Vibrant, and AT&T Captivate were under development for a while and Cyanogen (mod) just announced that it has been completed.So if you visit Cyanogen you will find the official nightly ROMs available for your device, allowing you to join and enjoy Cyanogenmod 7 and Android 2.3.4 like the vast array of Cyanogen users do.
If you do not know what Cyanogen Mod is, you need to wake up and study a bit. For now, CyanogenMod is a customized ROM or firmware distribution for several Android devices. After visiting Cyanogen site, you can check out supported devices and how to install Cyanogen Mod on those devices. Cyanogen is based on Google's Android Open Source Project, and of course designed to increase performance and reliability over vendor and carrier ROMs released by Google, T-Mobile, HTC, etc. CyanogenMod also has variety features & enhancements that are not found in the official versions of Android ROMs.
Follow the link below to learn about and down load the Samsung i9000, T-Mobile Vibrant, and AT&T Captivate ROMs.
Via Cyanogen Blog