sorry for bad english...
Have you ever wondered what "Web 2.0" is in the footer of Codeforces pages?
Yes I have. Don't expect me to tell you what it is. Instead I'm going to ask you what it is.
So what is this "web two point oh" that makes codeforces "only"?
I wikipedia'ed and couldn't get the idea of web 2.0.
Nobody has to has a good english.
http://en.wikipedia.org/wiki/Web_2.0 :
A Web 2.0 site may allow users to interact and collaborate with each other in a social media dialogue as creators of user-generated content in a virtual community, in contrast to websites where people are limited to the passive viewing of content.
That's what we're doing now — interacting in dialogue :-) Social networking aspects and blogs make this site Web2.0, and maybe to some extent the possibility of running your own contests (as opposed to passively consuming contests created by site maintainers).
And what makes Codeforces — The only programming contests Web 2.0 platform ? How Codeforces is different from CodeChef?