I am on 9.02 coming from 8.1. There are some bugs in the script but there are work arounds. You need to apply a Captivate fix so 9.02 sees you are doing the Flash on a i897 phone. There is a App now that you set the Preferences you want the ROM to install. Then you have to Flash a Captivate Modem but 9.02 does work and is fast and Smooth. Joel aka Darky is working on a 9.03 which I think will become Labeled as 9.1 at the moment. I also read I think be might be reworking 8.1 so the App works for it also. Here more info on 9.03 and Beta.
Darky 9.X BETA | Darky's ROM