This Slashdot post notes that Carnegie Mellon's Open Learning Initiative is available to the public. However, unlike MIT's OpenCourseWare which is a content delivery system (granted, with a lot of useful content), OLI is a community-based approach with some innovative, interactive features:

OLI courses include a number of innovative online
instructional components such as:

• cognitive tutors
• virtual laboratories
• group experiments
• simulations

Cognitive theory and faculty expertise guide the
initial development of each course. As the courses are delivered,
OLI researchers conduct a variety of studies to examine the effectiveness
and usability of various educational innovations. The research results
are used not only to improve the courses themselves, but also to
contribute to a growing understanding of effective practices in
online learning environments. (from the Project Overview page)

It's nice to see that Carnegie Mellon is using OLI as a way to test new pedagogical tools in an open source developmental style. With the potentially larger user base from making this system public, Carnegie Mellon scholars should be able to leverage a wider range of feedback in user testing.

Hopefully we'll see more of this as educators begin to understand that open content is not just about access to materials for students and other teachers to use, but also a new twist to developing pedagogy that is rooted in the long tradition of pratictioners who have shared their ideas and content with others in a way that futher develops our teaching practices by more than just depending on the publishing of research.