Web 2.0 has been providing the read-write capabilities and has been harnessed to a good extent. Web 3.0 is the way to go .SAAS is going to provide a major breakthrough and rich user experience with easy customization and data in the sky.

I was going through this article by Jeffrey Zeldman, and is worth reading ... Enjoy!!

http://www.alistapart.com/articles/web3point0

For me, to read it later.....i could have used digg, delicious ..unfortunately , I don't have a account still...so :)

http://student.bmj.com/issues/08/03/editorials/095.php