Thank you all for the input. Glad to see that I am not the only one tweeting here!

No one website in the world is useful the thing is how you make a website useful, if you are getting some interest from a website you like a website, getting info from the website then it is useful for you. I am using twitter from last 4 years and i have more than million followers, this a kind of marketing tool in which you published you content you post whatever it is. If you are from Internet marketing back ground and following some internet marketing companies then you'll get the update from these companies which can be useful for you.