I'm glad other people are recognizing the growing issue of identity in a Web 2.0 world. Unless we address identity with a scalable, inter-operable solution we risk seeing Web 2.0 stumble or see Web 2.0 security reduced to nothing more than a bad joke. Eric Norlin addresses issues not raised by Dion Hinchcliffe in addressing the Enterprise Web 2.0 world.
Ironically, I believe that Enterprise Web 2.0 will avoid the problem simply by virtue of the spending power that larger enteprises can yield. They have the ability to influence development of Web 2.0 apps that will interoperate with established access and authentication management tools. The problem is that Enterprise Web 2.0 will probably lag behind Web 2.0 in the adoption curve. This leaves consumers with a growing exposure to poor online security practices and techniques.
The growing awareness of Identity theft will raise pressure to find a solution but it may take a long time to achieve a widely deployed, interoperable solution that is adopted across the majority of Web 2.0 solution providers. I certainly applaud SXIP for their initiatives with SXIP 2.0.