Simon does a great job in explaining what is OpenID, what problems does it solve, what can you do with an OpenID and providing answers to a lot of other questions you wanted to know and never dared to ask about.
The presentation is composed by 178 extremely clear and informative slides, pure gold really!

A very important slide is #109: “Why is OpenID worth implementing over all the other identity standards?” Answer:

• It’s simple
• Unix philosophy: It solves one, tiny problem
• It’s a dumb network
• Many of the competing standards are now on board

Check OpenID, it is really simple, that’s why I think it will work. Making gnuband.org an OpenID URL took 3 minutes, now I can login in sites using gnuband.org as OpenID: no more need to remember a nick/password pair for every site and no more risk someone “steals” your preferred nickname.