Microsoft Office SharePoint Server 2007 Product Guide
CommunityMicrosoftSharePoint
Chris Johnson has posted about MOSS 2007 here > MOSS = Microsoft Office SharePoint Server http://blogs.msdn.com/cjohnson/archive/category/12742.aspx
There is quite a lot of information which has been posted on the Office preview site along with an evaluation guide.
http://www.microsoft.com/office/preview/servers/sharepointserver/guide.mspx
Exciting to see the new features and functionality, speacially after playing with the preview Beta at Mix 06 in Las Vegas. Finally we can now openly talk about features etc to customers. Yeai!