Yes, I am completely agree.
There are plenty of networking websites, but linkedin is the best!
It is growing extremely fast especially in the last year.
And more new features are added all the time.
Please feel free to send me an invitation to connect and visit my profile here: www.linkedin.com/in/alexz
I also use it.. These days a lot of head-hunters are using linkedin actively so if somebody is looking for a job or change then surely have an account there...