Hey there Facebook has certainly become the biggest social networking site. However,there are other networking sites as well related to personal interests like designing, gardening etc. So one can join those networking sites/forums also.
I would say facebook and orkut are best social networking sites, but best is facebook for both business and personal use
Out of the many social network sites we have today, the best are Facebook and Twitter. These two are the most widely used for their user friendly features.
facebook.com twitter myspace digg.com Folkd.com Reddit Buzz.Yahoo.com/ Diigo.com Faves.com/ all these are also the good website of social networking
Facebook (PR 10/10 & Alexa rank 2), twitter (PR 9/10 & Alexa rank 9), Myspace (PR 9/10 & Alexa rank 71) etc
The best social networking sites according to me are : Facebook, Hacker News, Twitter, Stumbleupon, Digg, LinkedIn, Diggo and Reddit. I have got the maximum traffic and reliable backlinks from each one of the networking sites above
Depends what you are looking for. If you want to get a CPA lead for a Free iPad offer, then Facebook for sure. If you want to sell a professional product, then Linkedin. The benefits to using Facebook is that you can target more people, but those people tend to have lower spending potential [kids, students, stay at home moms etc]. It is just essential to understand who you are targeting and how you are doing so.