The SharePoint 2010 Productivity Hub has just been released support SP1 - http://www.microsoft.com/download/en/details.aspx?id=28178. This has been a rather popular web site to install into SharePoint for knowledge management around Microsoft products. I have also seen customers take it and extend the content delivered in this site to support applications, business processes, etc. that are unique to their organization.
There were some issues with running this because unless you installed this because many customers upgraded to SharePoint 2010 SP1 but the installer files were targeted for a pre-SP1 build of SharePoint 2010. This has now all be resolved and is ready to go.