Ramesh Jain writes about the importance of the Time dimension:
If people can talk about Web2.0 and Where2.0, then why not When2.0?
When is definitely important. Time is arguably the most valuable resource we have. We can produce everything else, well almost everything, but can not produce extra time. Since we have only limited time and conflicting demands on our time, we as a society have always been developing tools and technology to make our time more productive, exciting, enjoyable, and rewarding. So it is important that we pay attention to time.
Interestingly, on the Web time has not received as much attention as it should have.