Shared decentralized authentication
Services like Shibboleth propose a decentralized method of authenticating CLAC or the entire higher education community, and is, I suspect, necessary to many of the shared services proposed. But Shibboleth is yet another area of expertise that each institution would have to invest in--unless we can share that expertise as well.
Ganesan Ravishanker commented
I agree with the topic, but OAuth and OpenID are better suited than Shibboleth.