Ayende posted a pretty compeling piece about the problems faced by the Open Source tooling projects in the Microsoft World (mostly .NET). I think he makes a lot of good points and I tend to agree with what he sayd overall (and I've said some of it in the past). I don't see it changing in the future, though, unless people (i.e. we, the community) force Microsoft to do so by not choosing he crappy replacements Microsoft sometimes put out.

Open Source, Microsoft, .NET