Have you ever wondered what people think of you? As much as you might immediately say who cares, when it comes to professional purposes, you may start to when it effects your role in your job or your company. There's a new site called Unvarnished.com. People can essentially write whatever they want about you, and vice versa. There are some controls but it gives a very candid, and possibly damaging perspective on you; provided you're featured.
Founder of Craigslist, Craig Newmark writes about it in his daily column.