After much anticipation and ballyhoo, the production releases of Windows SharePoint Services 3.0 and Microsoft Office SharePoint Portal Server 2007 are available for download.
Take a deep breath, and download the bits!
* The trial keys for MOSS 2007 are listed in this blog post.
After you've got the bits, here are some instructions and howtos on getting up and running:
Installing Windows SharePoint Services 3.0 on a Server Running Windows Small Business Server (This document shows you how to install Windows SharePoint Services 3.0 side-by-side with Windows SharePoint Services 2.0)
Installing MOSS 2007 RTM on a farm running MOSS 2007 Beta2 TR (Shane Young [MVP])
Upgrade from TR to RTM Work Around (Shane Young [MVP])
If you would like instructor-led assistance for upgrading to the latest versions of SharePoint, sign-up for our Upgrading From SharePoint 2003 to SharePoint 2007 course.
Once you've got things installed and running, send your information workers to our Applying SharePoint 2007 - Core Features course.