LAST EDITED ON Nov-05-07 AT 12:46 PM (PST)
 
Exploiting social bookmarking sites is another essential linking resource.

It can be done "by hand", semi-automatic or automatic and the techniques can range from pure whitehat to blackhat.

The most basic way to use social bookmarking is to put icons with links to the major bookmarking services so that your sites' visitors can more easily add your pages.

There are services that will allow you and your visitors to bookmark more than one service at a time:
www.onlywire.com
www.addthis.com

A common blackhat tactic is to use "proxies" (fake/multiple IP addresses) and multiple email addresses to create multiple bookmarking accounts.

There are also "trade" services, using the ol' "you bookmark me, and I'll bookmark you". We'll try to do this if there's enough interest. For more on this, visit this thread:
Web 2.0
http://www.dombom.com/cgi-bin/dcforum/dcboard.cgi?az=show_thread&om=9&forum=DCForumID42

Social Bookmarking Software (semi-automatic)

-!Delicioso! Social Bookmarking Power Submitter FREE
http://www.tagtooga.com/pg/delicioso

Delicioso is a freeware program for submitting URLs to these popular social bookmarking sites:
tagtooga.com, del.icio.us, furl.net, blogmarks.net, shadows.com, spurl.net, simpy.com, and netvouz.com.

- Social Bot - Inexpensive, very whitehat. $19.95

http://www.incansoft.com/IS0003.php

"SocialBot is a Windows Program that’s easy to use and performs all of the mundane tasks that are involved in Social Bookmarking. In a nutshell, you enter a domain, SocialBot spiders it and builds a list of web pages to bookmark and then it submits them to the Social Networking services you’ve got accounts with. At the present time, we support 19 sSocial Bookmarking Services..."

- Bookmarking Demon - $97 More powerful than the free/inexpensive applications above:
http://bookmarkingdemon.com/

- Social Bookmarks Submitter - Automatic Social Bookmarking Software $150
http://www.submitbookmark.com/

Server-side script (install on your sites) The most hardcore option - For agressive, risk-taking SEOers.
100% Automated
Multiple Accounts
Proxy Support

Auto Social Poster $197
http://autosocialposter.com/
This is a WordPress plugin that will submit new posts to a number of bookmarking sites.

Buy StumbleUpon hits - As I posted above for "linkbait pages": One way is to buy traffic from StumbleUpon for 5 cents each at:
http://www.stumbleupon.com/ads/

Send this traffic to your best link bait pages. As people see your page, and if it's good, they will "Stumble" it and your page can be included in the rotation. This can create FREE links for you site and traffic.

Some of the resources above are from Top Hat Bob...