Google added 4 new Ad Link units today. This time they are going horizontal with the Ad Links format. These new Link Units are potentially great to use under your header & possibly even before your own site navigation. The only complaint that users have about the Ad Links overall is that fact that it takes 2 clicks by a user for webmaster to recieve the credit for the click. Some feel this may possibly reduce their chances of click throughs.

The new formats are under the same classification as the first Ad Links. You may use up to 3 normal Text Ads & only 1 Ad Links on a single web page.

You can view the new formats here:
https://www.google.com/adsense/adformats