Looks like Steve Ballmer will be part of this year’s WWDC keynote presentation:

According to Trip Chowdhry, an analyst with tiny Global Equities Research, 7 minutes of Steve Jobs’ keynote is allotted for Microsoft. Microsoft will reportedly be talking about their development tool Visual Studio 2010. The new version of Visual Studio will reportedly allow developers to write native applications for the iPhone, iPad and Mac OS.

But could it be more than that? What if Microsoft announce that they are bringing .NET to OS X as well?