Demaestro - 8:17 pm on Jul 27, 2010 (gmt 0)

Google's plans are to monitor the movements of the cursor, such as when a user hovers over a certain ad or link to read a tooltip, and then provide relevant search results, and ads, based on that behaviour (sic). It means that it does not require users to actually click a link to know that they were interested in it

Very interesting idea. A lot can be learned by monitoring this behavior including stats like

"Hovered and passed"
"Hovered and clicked"
"Clicked with no hover"

Hope they share, it would help developing ad, title and blurb copy.