Aaron has just tweeted this:
Microsoft is filing a formal complaint with the European Commission as part of the Commission's ongoing investigation into whether Google has violated European competition law. We thought it important to be transparent and provide some information on what we're doing and why.
Their SVP and General Counsel then goes on to list 6 things that they want Google's bottie to be smacked for. Should be interesting.
http://blogs.technet.com/b/microsoft_on_the_issues/archive/2011/03/30/adding-our-voice-to-concerns-about-search-in-europe.aspx
NY Times have picked up on it as well:
http://www.nytimes.com/2011/03/31/technology/companies/31google.html?_r=1&partner=rss&emc=rss