If you have the Productivity Hub installed in your environment; you can now download a new content package that includes content for Access, Excel, OneNote, SharePoint, and more! You can find it here: http://www.microsoft.com/downloads/details.aspx?displaylang=en&FamilyID=277fefca-d62f-41bc-943d-79002254cfee
Don't have the Productivity Hub? The Hub is designed for large companies who need training for end users available behind their firewall. It is a Microsoft SharePoint Server 2007 site collection that comes packed with content, this blog feed, a discussion forum for internal end users, a content rating system, and a program designed to help end users help each other. You'll find the Hub at the URL above.