Two of our higher-ed clients use Shibboleth for SSO. I have zero experience with Shib, and do not have an instance to test with.
Ultimately we would like to integra
On Azure side, you would use WIF which has extensions to implement SAML 2.0 protocol (apparently still in CTP). You would not use ACS in between in this case. Warning: there are some gotchas while using WIF with ASP.NET MVC
:-) Benjamin
If Azure supports SAML 2.0, then it will, more or less, interoperate with Shibboleth. If it only supports WS-Federation, then it won't for your purposes.