Technical:

• CSS and semantically valid XHTML markup
• Unobtrusive AJAX Techniques
• Syndication of data in RSS/ATOM
• Aggregation of RSS/ATOM data
• Clean and meaningful URLs
• Support posting to a weblog
• RESTian (preferred) or XML Webservice APIs
• Some social networking aspects (share your data with friends, etc)

General:

• The site should not act as a "walled garden" - it should be easy to get data in and out of the system.
• Users should own their own data on the site
• Purely web based - most successful web 2.0 sites can be used almost entirely through the browser

      In my personal opinion,Web2.0 is not a new technolongy.It is just  a mode which pay more attention to user's communion.
      There is a PPT  for download,it is designed by Jim Cuene who organized a salon to make discuss of web2.0.


Filename                      Size
MiMA.1.part1.rar       1423KB
MiMA.1.part2.rar       1423KB
MiMA.1.part3.rar       127KB