I have personally been running CM7 Nightlies for quite sometime and prior to that, I never really cared to much about WiFi calling myself. I guess I’m not important enough to talk on my phone that much. :0) I do know, however, that you guys might or do. So when I saw this listed in the Vibrant section of XDA, I figured I should let your know it is available.
Segnaro has taken a great deal of time to get this functioning on the JPK 2.2.1 builds that are floating around out there. He is currently on Bi-Winning 3.0 and seems to work perfect for him. If you have any issues please go to the forums and let him know what your running. Of course please be sure your ROM is a JPV 2.2.1 base first though.
Head on over to his thread at XDA to pick up the file and then flash it through CWM to get it up and running.
Source: XDA