Salesforce login screen with ADFS 2.0 using SAML 2.0

Hi All,

Is this possible, end user enters his credentials on Salesforce login screen (https://XXXXX.salesforce.com)& gets authenticated on ADFS 2.0 end (https://ABC.XYZ.com/adfs/ls) and lands up on salesforce home page with SAML 2.0 response?
It will be really great, if we can get some pointers.

Thanks in advance