In an eerily similar timing, Fowler manages to hit a lot of the stuff that I am feeling, and he is doing it much better than I could.
This paragraph has certainly hit a note:
The attitude to open-source is a large part of this problem. When Java appeared there were yawning gaps in its portfolio, and worse some dreadful standard tools in its API (visions of Entity Beans spring to mind). Those gaps and bad ideas were fixed by the open-source community. Ant gave us a build tool, EJB was displaced by Spring and Hibernate. .NET has also got its gaps, and again the open source community has stepped up to fill them. Yet Microsoft refuses to collaborate with these efforts, even seems to go out of its way to undermine them. I was particularly sickened by Microsoft's reaction to NUnit - an excellent XUnit testing tool, elements of whose design were lauded by Anders Hejlsberg at OOPSLA. Microsoft ended not just bringing out a competitive library, but deliberately making it incompatible. That's not the kind of reaction that encourages people to invest their time in the platform.
That is one of the more frustratinng points in working in the Microsoft space, Microsoft is actively competing against its own community, and that diminishes the entire community (and Microsoft as well).