Microsoft CEO Steve Ballmer will not speak at WWDC Keynote

Ballmer had been rumored by Wall Street analyst Trip Chowdhry to be making an appearance at WWDC. He was expected to announce Microsoft's Visual Studio 2010 with support for iPhone OS and Mac OS X development.

Here is an official tweet from Microsoft:

Steve Ballmer not speaking at Apple Dev Conf. Nor appearing on Dancing with the Stars. Nor riding in the Belmont. Just FYI.