What is Social Media?
Here is a great definition found on Search Engine Watch,
social media: A category of sites that is based on user participation and user-generated content. They include social networking sites like LinkedIn or Facebook, social bookmarking sites like Del.icio.us, social news sites like Digg or Reddit, and other sites that are centered on user interaction.
Social Media sites can assist you in attracting visitors to your real estate website and can also be a great branding tool for you or your brokerage. Social sites are also an excellent way to obtain one-way-links, traffic and attract attention to your websites content.
Below is a great list that will assist you in generating direct backlinks to your site. 
Establish profiles on the social media sites below, and place a link on your profile, back to your web site.
1. Digg
2. Propeller
3. Mixx
4. Kirtsy
5. LinkedIn
6. Current
7. PostonFire
8. BloggingZoom
9. CoRank
10. Technorati
11. MyBlogLog
12. Bumpzee
13. LinkaGoGo
14. Bibsonomy
15. Mister-Wong
16. MyLinkVault
17. ClipClip
18. 9Rules
19. AssociatedContent
20. Blogoria
Tags: Real Estate Social Media, social bookmarking sites, social networking sites
