[Zope] OS choice for Intranet

I am investigating the use of Zope to host an Intranet. The main network is Windows NT/2000, presently using an NT Domain, but planning to move to Active Directory shortly. I am interested in what the advantages/disadvantages of hosting zope on a linux or Win32 platform. My experience is mostly with hosting on linux. Some things that already occur to me are user authentication and ODBC drivers, which I think would tend to favour win32. Any thoughts and experience or links to resources gratefully accepted. Peter