Here are 22 social media sites that are great for business.

1. Facebook – This site is an excellent way to become engaged with your customers. Start a page and start a conversation.
2. Twitter – Convenient and efficient way to let your fans and customers know what you’re up to.
3. LinkedIn – An extremely professional approach to social networking. This is a spectacular way to meet business contacts and to connect with new potential customers.
4. Digg – The most popular news submission site. Submit your blog posts and digg away!
5. Technorati – This is for avid blog readers and blog owners. Favorite great blogs and blog posts and track the reactions to your blog.
6. StumbleUpon – Another news submission and voting platform that can generate traffic to your web site.
7. Reddit – Vote for news pieces and submit your own.
8. De.icio.us – A social bookmarking platform where you can store your bookmarks and make them public or private. You can also connect with other users to view their bookmarks.
9. YouTube – YouTube is great for video-friendly companies. No one wants to sit around and watch a guy in a suit go on and on about making money at home in monotone, but if you run an entertainment agency or a record label or something fun, there’s always that possibility your videos could go viral!
10. Sphinn – This social news site focuses on search engine marketing and web development. A must if you want to keep on top of SEO strategies.
11. Wikipedia – Create your business’ page and add to other pages. You can also join in the dicussionsin the community portal.
12. FriendFeed – Aggregate the feeds from all of your social networking profiles and show your activity in one place.
13. Flickr – A photo sharing social network.
14. Last.fm – Install the software and it will track all the mp3s you listen to on your computer or mp3 player. The music you listen to will show up on your profile in real time, and Last.fm will suggest new music for you based on what you listen to, as well as introduce you to other people who have similar musical tastes.
15. WordPress – WordPress is a site where you can set up your own free blog and install widgets, as well as find blogs that interest you.
16. Plurk – Plurk is a microblogging platform that operates similar to Twitter but with a more literal timeline approach.
17. Tumblr- Tumblr is a great place to start an easy, no-frills blog or to aggregate your other blogs in one place.
18. Google Friend Connect – A way for users to connect on many different web sites.
19. Ebay – Not only can you sell anything here, but you can also create your own profile and start your own blog.
20. Xing – As the site says, “Global networking for professionals.”
21. Google Bookmarks – A place to store your bookmarks.
22. Esnips – Share content on the web and join a niche group of like-minded people.