It's commonly known that Twitter has started posting ads "in-stream" and there is a long list of content publishers lined up to serve up these ads. I am usually fairly wise to any kind of new ad, but I almost missed one today! See below for an ad from the New York Times stream that I was about to click on:
I'm not saying anything new here, but this is a great example of a compelling way to reach targeted, and engaged audiences through new approaches to advertising and marketing.