I never understood the criticism of LinkedIn. It's the least intrusive of all the networks I am in and probably the most valuable when I look at who it gives men access to and it allows others who look for someone like me to find me.

I've been on linkedin almost from day one and I still haven't found anything even remotely comparable to Linkedin in value. It's like the google of professional networks. Sure you can use other networks that will make you feel like you are missing something.