I followed this guide step by step and everything worked like a charm! I'm a newby at this phone tinkering business and found everything on XDA so confusing and nothing on my I9000M. This saved my day. Thank you!
Uh oh... just realized something. I had done this a couple days ago before JD updated the post on JB vs. ICS and I realized I'd put the ICS google apps on the CM10 JB. Is that gonna be a problem? My phone seems to be running fine....