Steps for SAML ADFS Scenario

Hi,

I've seen steps for configuring SharePoint 2007 to Rely on a Federation
Server for claims based identities. But in that scenario, the Federation
Server was configured to trust another Federation Server. Does anyone have
any reference documents if the Federation Server would be configured to trust
a SAML IdP? In the long term, I probably want to be able to configure that
IdP to also trust a Federation Server, but for the short term, I just need to
know how to get ADFS to trust a SAML based IdP. Thanks.

Patrick Markiewicz