The esteemed Chuck Severance (former Sakai CEO) has put together a video about IMS LTI.
This is a technology that will appear in WebLearn next year and which allows departments or colleges to integrate their own tools into WebLearn. Information such as username and WebLearn context (ie site) can be passed from WebLearn into the departmental tool.
If you want more information about how this will work then please contact the WebLearn team via the usual route.
The video
