Zoheb's method works, I unwittingly typed up my instructions in my own thread:
http://forum.ppcgeeks.com/showthread...ght=activesync
But it's basically the same method. To reverse the process, you'd basically need to follow the same steps and reverse the settigns. It's really easy.
I think the bigger benefit I've seen since this morning - is that my phone hasn't turned itself on at all. So I expect to see some battery life savings. I suspect that activesync was turning on my backlight overnight - causing my battery to discharge.