It looks like this is the RTM bits of WSS 3.0 and MOSS 2007 – YAY!

MOSS– 180 day trial

http://www.microsoft.com/downloads/details.aspx?FamilyID=2e6e5a9c-ebf6-4f7f-8467-f4de6bd6b831&DisplayLang=en

WSS 3.0

http://www.microsoft.com/downloads/details.aspx?FamilyID=d51730b5-48fc-4ca2-b454-8dc2caf93951&DisplayLang=en

Get your product keys and installation upgrade information from the SharePoint Blog post here.

Thanks to John Hodgson for finding these – seems they went out under the radar.

BTW – this is the first time I've ever got the scoop on any of the SharePoint blogs (SharePoint / ECM / RECMAN)