As internet marketers guess we dont in anyway doubt the usefulness of social bookmarking.

9 most popular Social Bookmarking/News Sites You could submit your website to get free backlinks

1 Digg : The social news site that changed the Internet

2 Yahoo! Bookmarks: The MOST POPULAR social search and bookmarking service on the web.

3 Technorati : Always changing and reinventing themselves, this recognized authority offers links to blogposts, tagging and a social bookmarking WTF section.

4 StumbleUpon : Owned by eBay, has a considerable amount of traffic

5 del.icio.us : It allows you to easily add sites you like to your personal collection of links and to categorize those sites with keywords.

6 Reddit : Timely and shocking news oriented, Reddit stories are instantly voted upon and if liked by the community as a whole, can drive incredible traffic and users.

7 Restnews: SEO Social Bookmarking, your scoop can be published in real time and get free backlink easily.

8 Mixx : An up and coming bookmarking and social news sharing network which should rival Digg, Reddit and others, Mixx blends popular photos, videos and stories.

9 Propeller : Formally known as Netscape

Saw this somewhere and though it was good to share it here too. There are hundreds of them. By searching on Google you will find them all.

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Good list.

Ya, there are so many, it's just unbelievable. Seems I run into a new one every day. Almost to many...lol

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I'm a big fan of the DoFollow ones such as Mixx, Furl, JumpTags, Propeller, etc. I still use Digg and Delicious, but don't get much traffic (most likely because of my niche). Socialmarker.com is a great free way to bookmark your sites across all of these networks.

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Nice list. Btw: Digg used to be dofollow until they decided to go with the DiggBar thing. Now all links are done through their short url redirect.

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I'd like to add a few more Social Bookmarking sites to list that i think are a good source for generating traffic apart form the ones mentioned above:
Fark (Drew Curtis' FARK.com)
Newsvine (Newsvine - Get Smarter Here)
Slashdot (Slashdot - News for nerds, stuff that matters)
mybloglog (MyBlogLog)

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Mr_Fred
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I'm newbie here and I'm starting to use SMO for my sites thanks for the social bookmarks list.

I have been currently using only Digg, StumbleUpon, Reddit and Propeller for Bookmarkings. I hope that the other sites will also be of some good help to me.

Thanks for sharing......

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Apart from these some are:
spurl.net
faves.com
blinklist.com
connotea.org
bibsonomy.org
spotback.com
bebo.com
oyax.com
a1-webmarks.com
yattle.com
mypip.com
mylinkvault.com
clipclip.org
squidoo.com
dzone.com

C ya

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Thanks for sharing, but this list is more comprehensive: vmoptions.com/social-networking-list.php

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thanks for sharing above bookmarks site but we all want more bookmarks site.. so please post more & different form above