I missed something important about Windows Media Services WMS in Windows 2008. A lot of the features that were previously only available in Windows 2003 datacenter or Windows 2003 Enterprise editions are standard in Windows 2008! Yipee and about time!
The inability to write custom authentication plugins except for the advanced windows versions prevented an old project from actually being viable. Now custom authentication plugins will work for me.
The new 2008 version is reportedly much more efficient and up to some serious traffic and has some other very relevant to features to some work I cant talk about;