Windows 7 is beta and consequently should be regarded as highly experimental.
I have not installed windows in the host, but have guest vm's with windows 7 on.
For some unknown reason I have experienced several bsod crashes in the host, when running windows 7 as guest (while also simultanously working with the new dism.exe in the guest.)
I guess we have to live with all this as long the new OS is beta and as long as vmware not officially supports it.
Joakim