Well, It seems Digg is not favorable in google eyes after the Google Penguin update. sorry.

Pinterest, Facebook, Twitter, digg, Tagza are the most useful websites .

I'm 20 hour onliner on Facebook...
:)

In my opinion Facebook & Twitter are the best sites to boost your business.

Facebook is best for marketing ,communicating .A best and most visited social network .Facebook allows us to create business pages and communities.

To my view facebook is the best...........

My choice is first fr Facebook and then go with Google+. Twitter is also good along with Digg.

I think Facebook is the best.

Facebook is best for business. , see my Facebook Group for Business Blog.

There are lot of Social Networking sites available.

i think Facebook and Google+ is the best.

Facebook , digg , twitter is the best social networking sites

Facebook of course :)

Facebook , Twitter , Digg is the best one

Facebook , twitter , Linkedin

Facebook , twitter , Digg are the best social networking sites

Facebook is most popular social networking site. Because it is used by majority and the results are also very impressive.

Facebook is the best social networking site that works more on business.

All of the social networking sites are helpful in your business especially when you have lots of followers and subscribers like the one on this official source. social signals are also the best way to get noticed by search engines!

Up to my knowledge, I think it's Twitter because i got mostly traffic from Twitter.

Facebook is the best social networking site promote your website get effective traffi.

Well i used by all three of them but up to my knowledge, Twitter is best
it gives traffic than others.

Any place that helps you get traffic seems to do the job, doesn't it? ;)

LinkedIn also a good social networking site.

HI,

according to me all are good for business. if we know how to work on twitter, facebook or Google+ then we can get more and more traffic from there. it will help to increase our website sales.

Some more social networking sites:
fark.com 7
shutterfly.com/ 7
43things.com/ 7
metafilter.com/ 7
tags.library.upenn.edu/ 7

According to me, Facebook and LinkedIn is best social network sites to me.

Facebook, Twitter, LinkedIn are the best social networking websites.

facebook n twitter

Facebook, Twitter, LinkedIn, digg, stumbleupon, Google+ is the best social networking site.

I used both,but Facebook is more advanced.

Google plus and twitter are best social media sites, with the help of these sites you we can promote our business easily and quickly drive a lot of traffic.

Facebook and twitter ......both are good

For more on business then Twitter.

Facebook, Twitter, Google+ this three social networking site I used. I think this is the best and effective.

Facebook & Google+ are the good site which will helpful to increase the traffic and business of website.

In my point of view, Facebook is the best social networking site that works more on business.

I will be suggest to Google+.

I think Google+,twitter,linked in are the best social networking website for getting more traffic and business for your website.

some social networking site.
- Myspace
- Digg
- Digo ..etc.