Twitter is a quickly growing social network, designed around the simple question "What are you doing?". Essentially, users answer that question in 140 characters or less and post it so that all of their "followers" can see the answer. Before you dismiss the network as banal, think about how you might watch for sales oopportunities or broadcast useful information on Twitter.
Here is a directory of real estate professionals using Twitter to build their businesses, today.
Watch this video to learn how to set up and use your Twitter account: