Many people are critical to Facebook, but I claim the reasons they are critical are flawed.
The main reason to be critical to Facebook, is not due to privacy and such reasons.
Facebook is not the web, in the same was as iPad is not a computer.
On the web you can refer to anything you find interesting by linking to it, and make any kind of mash-up, to further enhance the web.
On a computer you can run any program you want, and write any program you want, but on iPad you can not.