I've published a new screencast on http://channel9.msdn.com/niners/bombom. It shows you how to use FormsAuthentication on a Windows SharePoint Services 3.0 site (WSS 3.0).
It then continues with showing how to enable multiple authentication methods on one site (using Windows authentication and FormsAthentication simultaneous).

Last but not least it shows how to create a page in SharePoint that let you administrate your users that uses FormsAuthentication (in this case how to create new users).

As usual it's in Swedish, but you'll get the picture anyway.

Oh, yeah. It starts where http://channel9.msdn.com/ShowPost.aspx?PostID=314283#314283 left off.