Here are some other opinions on whether Microsoft should do more to support the .NET open source community (the list also includes some related discussions):

• Should Microsoft Financially Support Open Source Projects? by Joe Brinkman
• Should Microsoft Financially Support Open Source Projects? by Phil Haack
• Will Microsoft Subsume Open Source? by Wyaatt Barnett
• Open Source Projects As A Form Of Community Service Don catalogs some of the related opinions:
  • Phil Haack talks about his ideas behind helping/saving the open source community and laid down a challenge. 
  • Eric Wise mentions that he will not work on another FOSS project. 
  • Scott Hanselman laments that Microsoft hasn't put together an Ineta like organization to handle giving grants to open source projects, and also shows how easy it is to submit a patch/fix to a project.
  • Peter Provost worries that bringing money into the equation may spoil the cool part of community developed software, and that leadership is the key to good open source projects.
  • Derek Denny-Brown says that "Microsoft needs to understand that Community is more than just lots of vendors creating commercial components, or MVPs answering questions on newsgroups".
• NDoc dead, Community Contributions by tomas restrepo
• Open Source, the Microsoft Community and Funding by John Lam
• Open Specification Promise by Jason Matusow
• Is your project fiscally sound? by Joe Brinkman
• eWEEK Labs Bakeoff: Open Source Versus .Net Stacks
• NDoc 2 is Officially Dead by Charles Chen
• More Tool Stagnation to Come? by Daniel Read

Let me know if I have missed any good articles.
My past articles on this subject can be viewed here.