Actually, my post was in response not to you Randman, but to various news articles going around on the net about this. I didn't really read the thread. ha!
The thing is, I am not sure what type of privacy is being lost by having viagra ads on a romantic email. That is no different than reading an article about cameras in Macworld and seeing an ad for cameras on the other page. Google isn't "reading" your emails, all they are doing is matching keywords. It's the same thing they do for ads on this site or any other site carrying ads.