Another ICS ROM you can try on your i9100 Galaxy S2 besides the leaked ICS ROM is the CM9 (Cyanogenmod 9) ROM. This one comes with Face Unlock and everything working except camcorder.
This is another great ICS ROM that gives you full ICS experience (without TouchWiz) you can try for now.
Downloads:
Download CM9 ROM
Download Face Unlock
Download GoogleApps
Install all of them from ClockworkMod Recovery.
