We like the MS Productivity Hub
from sharepoint for end users
If you’re looking to reduce training and support costs or drive end-user technology adoption in your organization, you might be interested in checking out the Productivity Hub.
The Productivity Hub is a downloadable SharePoint Server 2007 site collection that is pre-populated with over 300 pieces of content about Office programs (including SharePoint Server!). The content includes videos, documents, and PowerPoint slides. It’s a great solution for organizations that block Internet access—including access to Office Online — but want to support end-user technology needs.
In addition to offering end-user productivity resources, the Hub features training for "coaches," or power users internal to each customer. Coaches reduce the burden on training and helpdesk staff by adding another level of support.
Microsoft will provide quarterly content updates beginning August 2009. Future content additions for Windows 7 are planned. The Productivity Hub will eventually be upgraded to SharePoint Server 2010 and Microsoft will have a migration path for customers currently using the SharePoint Server 2007 Hub.
An online demo of the Productivity Hub is available, and you can download it directly from the Microsoft Download Center.