As a public service, therefore, I’m offering a handy clip-’n’-save guide to the social networking services you’re most likely to hear about at this summer’s barbecues.
Facebook- This is the biggest social networking service, with almost 500 million members — 22 percent of everyone on the Internet — and it’s growing by 5 percent a month. Similar to Facebook- Myspace, Bebo, Orkut
LINKEDIN - It’s Facebook for the professional set
TWITTER -This is the service that lets you send tweets — er, brief, 140-character updates that feel a lot like text messages. Using search.twitter.com, you can find out what the world is saying about you, your company or any topic that interests you. Similaar: Google Buzz,FriendFeed,
Others: FOURSQUARE, Gowalla, Loopt, Brightkite, YELP, OpenTable,UrbanSpoon,