Just a quick post. I keep emailing these links to people so I thought I would write them down and just post them.
Microsoft Office SharePoint Server 2007 180 day trial When you download this you will need to register to get a registration key (PID)
Windows SharePoint Service 3.0 For those of you who don’t want portal product. No key required.
A good resource for install documents can be found on the SharePoint Team Blog
Hope this helps!
Shane – SharePoint Help