Last week, we re-released the ADFS Step-by-Step Guide, which has a new Appendix A – “Using SharePoint Portal Server 2003 with ADFS.”  This details how to setup a SharePoint server to work with ADFS.   

http://www.microsoft.com/downloads/details.aspx?FamilyID=062f7382-a82f-4428-9bbd-a103b9f27654&displaylang=en

If you are interested in using ADFS with SharePoint Portal Server, please contact me.