Who 2.0 (and everything 2.0)

Tim O’reilly first coined the term web 2.0, and now he tends to ends all his predictions with “2.0″. Recently he talked about Who 2.0: the need for a good digital identify may finally be fulfilled in the near future (link. And Where 2.0 (link)
So what will be next?
Here are some candidates:

• What 2.0
• How 2.0
• When 2.0
• Why 2.0
• Education 2.0
• Privacy 2.0 => The only people that can not be traced are the people desperately needing help like people dying of Aids
• Windows 2.0 (oh no we already covered that one)
• Society 2.0

What do you think needs a 2.0?