Am doing a test drive for SAML SSO from OpenAM to SF.com.

IDP: OpenAM

SP: https://saml.salesforce.com

I created a sub-domain for my account and enabled SAML for SSO. When I enter my subdomain URL, I am redirected to my IDP's login page with a SAML Authentication Request via HTTP-POST binding. How can we configure SF.com to send this SAML Authentication request via HTTP-Redirect binding? Is it supported? If so, how do i configure this?

I have an account in the Developer Edition.

Thanks