dito
For the same reason, moving to Front-End development on my next job (mid-june).
edit: just found http://www.getchef.com/solutions/windows/ That'll help.
The reality is that Windows DevOps means rolling alot of your own and integrating back with the System Center suite, specifically Operations Manger, Configuration Manager and Virtual Machine Manager.
What is nice about the Windows world is most of the core services actually have decent either fully managed (.NET) or atleast reasonable native APIs. Powershell is also very widespread now which is quite nice to interact with from C#/.NET.
VMM is actually great. As are the technologies that come with it. NVGRE and the new multi-tenant gateway (net compartments + BGP basically) is awesome.