I've been reading on various sites the privacy and ethical and legal concerns raised by Google's data retention/sharing policies and by GMail. I currently used hotmail, which sucks in innumerable ways, and am considering switching to GMail, so I figured I'd check the largest collection of computer guys I'm familiar with and see what input I might be able to get.

So, question is: what is your impression of GMail, and what (if any) concerns do you have about Google's privacy issues?