I think part of it was something like "if you access corp from a device, you have just tainted it and we can dig around on it at any time, including when you quit", which I mechanically translated to "never read my mail, Buzz, or anything else from home unless I'm on the company laptop or the Nexus One which they gave me and is fundamentally tainted anyway".

This could have affected my personal iPhone, Linux box(es) at home, and anything else which might have accessed google.com/a/google.com/... resources. So, I basically stopped checking mail unless I was at work.

I also think they tried to make it retroactive to the day I started work, but I'd like to see that fly in a court of law. Retroactively tainting my machines? Good luck with that.