Y'all might remember a thing mentioned called LTI (Learning Tool Integration).
http://moodle.tcea.org/index.php/news-topmenu-40/130-lti-learning-tool-integration

Original Source:
http://www.imsglobal.org/toolsinteroperability2.cfm

Some BIG players: Blackboard, Educational Testing Service, EDUCAUSE, Flordia Virtual School, Follett, Microsoft, Moodle, MoodleRooms, McGraw Hill Education, and Pearson Education.

Affiliates listed ONE Texas ISD: Round Rock Independent School District.

Hmmmm … missing in action: Epsilen (but they are a closed system … cept for New York Times content).

Well, in M2.2+ there is now an LTI tool (consumer) and just today an add-on for M2.2 called LTI Provider.
http://docs.moodle.org/22/en/LTI_Provider

Have it installed in two instances of M2.2 for the Moodle Academy 2012 and in a Sandbox.

It takes some tinker time, but it does work.

Attending the Moodle Academy at the TCEA Conference?

Check it out: http://moodle.tcea.org/moodleacademy2012/ and a Sandbox http://moodle.tcea.org/sandbox2/

Shameless Moodle Academy 2012 ad: Moodle 2 the Good, the bad, and the Ugly!  (GBU!)