Editor's note: This month, Inman News is offering an essay competition focused on the use of social media in real estate marketing (click here for details). We want to hear how you've put social media to work and whether your strategy is paying off. By JUDITH LINDENAU The use of social media is skyrocketing, as we all know. And myth No. 1 is that it's the young people who are signing up and twittering about what they ate for breakfast and who they're sitting next to at the beach. Wrong! Facebook is being inundated by the boomers (known as "Silver Surfers"), and Twitter is literally everywhere. "Here comes everybody!" as media guru Clay Shirky proclaims. The "everybody" is led by businesses. On the Internet, you'll find countless articles on how to bu...