I made a short video tutorial about the OpenID Provider plugin:
Which is now available to Moodle 2 users
Download: http://tracker.moodle.org/browse/MDL-12903
Helen,
I am not sure that here is the right place to post it, so feel free to move this post to another Forum where it will be more usful to users that look into ways to integrate Web2 tools that support OpenID authentication into their Moodle systems.
Please spread it around