There are many apps on the Market that will allow you to save and restore your data to a Samsung ROM so you should be able to get back to a working state easily.
Q: How do I go back to a Samsung stock ROM?
A: The easiest way is to go back to stock using Odin and flashing a full stock firmware (including PIT file) with repartition checked. Do a Titanium Backup of your data and save it. Then use Odin to go back to stock. CM7 installs a different file system, therefore you have to use Odin to go back to stock file system. After that you can flash whatever other Samsung based ROM you want to restore your data.
Q: Why is the thread closed?
A: We do not take insults and threats lightly and have no wish to continue interacting with the developers and/or users who would like to keep at it in the threads we started. As the device is no longer supported, and we've disabled futures builds for Vibrant, this thread is now closed.