In response to a blog post about a Google ad from Microsoft (seen here) by a member of the Drupal community, Mark Brown of the Web Platform group at Microsoft has posted an apology for the "Forget Drupal..." tagline the ad sported.

First, I want to offer my sincerest apology for this. I have contacted Google and we are working on having this ad pulled as soon as possible. In addition we are working internally to ensure this doesn’t happen again. Second, I want the Drupal Community to know that Microsoft and the Drupal Community have been working together for some time now to make Drupal better on Windows.

Mark also points out that there's a lot of marketing Microsoft is doing all around the world to help promote the Drupal project (especially with it being one of the initial PHP packages in their Web Platform Installer). The ad was found and has been removed from circulation.