Eugene just did a great post about Free Identity as a recommendation of what should fill out Jimmy Wale's post from wikimania of 10 things that need to be free.

Here is a sumary of the top 10 so far
1. Free the Encyclopedia!
2. Free the Dictionary!
3. Free the Curriculum!
4. Free the Music!
5. Free the Art!
6. Free the File Formats!
7. Free the Maps!
8. Free the Product Identifiers!
9. Free the TV Listings!
10. Free the Communities!
It does seem very relevant to have free communities one needs to have free identity to move between communities smoothly. Hopefully the walled gardens will figure it out.