It’s a sad day for those of us with a Samsung T959 Galaxy S Vibrant as CyanogenMod will no longer support T-Mobile’s original Galaxy S. The reason for this is said to be way the radio interface layer interacts with the audio layer which results in the inability to dial 911. Just as you should CyanogenMod is taking the safety first approach and will no longer support the Samsung Vibrant (at least until Samsung releases the source code). Here are the words from one of the developers of CyanogenMod:
We are no longer supporting the Vibrant due to the inability to dial 911. We consider the issues related to this unresolvable without source code from Samsung related to the Radio interface layer and its interactions with the Audio layers and have taken the decision to no longer support this. We apologize for the inconvenience and strongly suggest that Vibrant users use a Samsung ROM due to the 911 issues with any ROMs based on open source code.