What is Identity 2.0 and as a web developer, why do I care?

I’m not really sure what Identity 2.0 is but here are some very interesting slide show talks about it, and it looks to be solving some very interesting web security problems.

• OSCON 2005 Keynote – Identity 2.0 – Dick Hardt – Founder & CEO, Sxip Identity
• Who is the dick on your site?
• http://identity20.com/
• Identity 2.0 article by Kate Greene