Gmail and Privacy

A client suggested that I give my other clients a heads up about Gmail: "I noticed that when I checked your message on Google this morning there were six advertisements relating to IRA's and financial planning on the page with your email.  This means that Google must be filtering my emails for keywords and is placing targeted advertising on the page based on the contents of my emails, which I don't like--it seems like an invasion of privacy."

Also see this page.