SSO with social networking site

HI,

We have a social networking site(yammer) running on SAML2.0 which is getting authenticated with ADFS. we would like to pass sap portal logged-in user to yammer and display the corresponding user details.

To achieve the same, we going with following approach.

1) we are going to call the service of ADFS and authenticate manually using java code.

2) After successful authentication, SAML token will be returned as part of the response

3) Using javascript, we will pass SAML token to yammer site dynamically. As a result it should not ask for authentication.

Pls let us know if anything better can be done ?

Thanks,

Mano.