Want to start a SharePoint user's group?

If you are planning to do this, then check out the Community Kit for Sharepoint.

The Community Kit for SharePoint is a set of best practices, templates, Web Parts, tools, and source code that enables practically anyone to create a community website based on SharePoint technology for practically any group of people with a common interest.

Source code for the CKS is hosted on CodePlex at http://www.codeplex.com/cks.