Here is an excellent blog post written by Dave McClure, on using facebook on a strategic level for business.
"it’s impossible to ignore the growing size and scope of Facebook, and the impact it’s having on internet startups and traditional businesses alike".

  RE: Is this blog dead?
My dance skills and co-ordination are pretty pathetic , so thank goodness that I have a jive when it comes to marketing, I am involved in the groupjive project (the groups and social networking component for Joomla!) in the media and marketing team, check out the project at joomlacode.org.
So once again, time is scarce resulting in the blog posts to evaporate in frequency! 
NOTE : Too all the security services monitoring this blog because of these words being used, BOMB, Explosion, Terrorist, KEVIN RUDD …

How does crowd-sourcing help to develop an idea or business?
 
"Crowd-sourcing allows ideas and concepts to evolve and emerge through participation and contributions of a diverse audience. While subject matter expertise is relevant, it is also meaningful to gain feedback from customers, potential partners, investors, as well as gauge general public perception".
Another great social networking tool! 

How to Get Your Customers to Solve Problems for You?
Crowdsourcing is the way to turn your most passionate customers into a powerful talent resource.
Use these techniques to harness the intelligence of customers that love your business, talk about your business, and better yet, will do free work for your business in today's increasingly democratic, user-generated, social-networked, marketplace.
What Is Crowdsourcing?
With the advent of Web-based communications tools and open-source software, it's become easy for companies to access large numbers of people who will trade their expertise and talent for …

Here is a good linking building technique from linkbuildingblog.com.
4)  Flamebait – like linkbait only flame grilled. 

This one is slightly more left-field than the others and I wouldn’t recommend doing this unless you were sure what you’re doing and also don’t mind a bit of a word-fight! The basic premise? Find a way to get sued. Working on the any PR is good PR (and equivalently, any links are good links) Andy Beal blogs about the subject in more depth here. The holy-grail for this tactic is to get sued …

Ning (which means “peace” in Chinese, in case you were wondering) currently provides by a wide margin the best platform for setting up fully functional and visually appealing social networks from scratch. While Ning attempts to provide essentially the same out-of-the-box service as GoingOn, Me.com, PeopleAggregator, and ONEsite, none of its competitors can yet match the professionalism of its product.
The company’s superior execution has so far earned it 76,000 hosted networks (although, browse Ning’s list of “popular” networks and one gets the strong …