There’s a great presentation on Slideshare.net that shares the storied history of Moodle at Open University (@openuniversity), their decision to adopt the open source software, it’s subsequent customizations and upgrades and the particular challenges that one of the worlds largest Moodle has faced. Note that OU has over 500,000 registered users and an estimated peak concurrent user role of over 2000!

Open University has provided support and direct development contributions to many of core features (not to mention re-writes of more functional module such as forums, blogs, a new wiki and the new re-write of the quiz editing system) over the years and continues to be one of the driving forces of innovation to the Moodle platform.

Check out the presentation at this link (or embedded below): http://www.slideshare.net/ram65/moodle-at-the-ou-moodle-moot-2010

There is a lot of great information pertaining to large scale Moodle installations and the various efforts that are required to keep them running at maximum efficiency.

Related posts:

1. @sandrapires shows us the best ways to use Moodle (awesome presentation)
2. Web 2.0 Tools and Techniques Presentation by @markdrechsler and a wiki video by @josephthibault
3. Selling Courses with Moodle Presentation from #iMoot2010
4. @howtoMoodle shows the #Moodle2 theme, learn how to get it now for your current Moodle
5. “Creative Uses of Moodle Modules” Presentation by @paula_teach