Last week I wrote about a Nike Golf / Golfsmith social media campaign that rewarded Facebook fans with special giveaways and discounts. The following ad units appeared alongside that blog post. They appeared instantly - within seconds of publishing. It is the first time I have seen units like this - but am sure they have existed beforehand (unsure how long?). The ads feature the Twitter icon and and a "follow me on Twitter" badge for Golfsmith's official Twitter account. Their latest tweets are included and cycled through the banner.

The ability to render these ads contextually and dynamically - and within seconds of publishing - is impressive. And the context and fresh content make the ads.

The only critique: the Twitter follow button should be functional within the ad unit (it currently requires users to click and then follow).