Definition of Web 2.0

I have this idea about Web 2.0 in my mind all these while, that I view it from three different perspectives:

• Users'
  
• Developers'
  
• Technology-wise

Yes, perspectives. It's not just about the keywords that you can see from the Web 2.0 cloud at Wikipedia. It's about how the pieces giving an impact to each of the aspects above.

I have tried to put it into words today, and I did, in one of my colleagues' blog comment I wrote this:

"Web 2.0 is the revolution of user experience, which a developer should always put in mind and into practice by using today's technology."

- yc