Even More Ads Coming to Gmail

Google has been trying hard to monetise its popular email service Gmail. Recent efforts, as noticed by various bloggers, include to only ads show in the Web Clips box unless a user clicks on the navigation arrows. We have noticed in some of our accounts that Google is now testing ads at the end of a email message. The ad is highlighted in yellow and is clearly labelled as an "Ad", similar to the look-and-feel in search results page.

I personally find the ads not too intrusive but it definitely catches more attention as compared to the conventional ads on the right-hand side. What do you think about the new ads? Do you think they are too intrusive?