Well it looks like Microsoft wants a decent build environment now as well. A quick search reveals that it's not very new, but very little real information exists.
An interesting quote I found is from an entry on Jerry Dennany's blog:
"In addition, MSBuild will ship on every OS starting in longhorn. Actually, they’ll also be shipping the .NET compilers there, as well."And who said that Linux doesn't influence Microsoft!
There is an episode of MSDN TV about MSBuild, which I might watch when I get home. I'm not sure I will though, as I find those MSDN TV things extremely boring and have only ever managed to watch about 4 minutes of one before turning my P.C. off.