Microsoft has become more and more receptive to Open Source.  MS has created their own Shared Source Initiative and here is what the Open Source Initiative has to say about that.  But MS is going even further.  I have seen a number of presentations using NUnit and SVG# specifically.  I think NAnt and Ant have definitely made a distinct impression!  But now MS is even going further.  This Slashdot article reports that MS has actually posted something on sourceforge!  Go figure J.  I only hope that MS gets the point that everyone likes tabs in their browsers!