Just a wee footnote - yesterday I Pete McCudden http://www.netidme.net/ I am looking at how to secure big internet experience for young people. I am not sure if there is any other work going on in this area in Scotland. Pete is happy that I post his contact details email@example.com
Open ID means you only need one password for everything but we still can't authenticate with any degree of certainty who you are. Systems like Netidme give us more of the authentication we need around who we are dealing with on-line. They have system that works for big people and a parent/guardian hook up for the under 16s.
I am looking at it from point of view of delivering assessments and perhaps having trusted communities for learners. Info will also feed back to Internet Safety qualfication.