Hey folks, I just wanted to let you know that CA SiteMinder and Microsoft folks have been working together to create a whitepaper that details how to federate identities between CA Federation Manager and SharePoint 2010.  They have recently released this paper that describes in great detail how to do so.  Please check out http://interopvendoralliance.org/labs/siteminder-federation-to-sharepoint-2010.aspx for details.