Here is an interesting article on PDN about photographers who have successfully marketed themselves online using social networking.
The most important thing to remember….
“It’s clear that success online doesn’t always translate into jobs. A hit YouTube video won’t make your phone ring, and a Twitter stream alone generates no revenue…
However, all of these photographers credit the Internet with leading to some work, and in at least one case, financial success. And it’s hard to overstate the personal satisfaction of having a legion of online fans.”
– Daryl Lang, PDN