I have been a long-time user of LinkedIn and Xing for my business contacts. I started hearing about MySpace and Facebook a few years ago but felt that I did not need another social network. But I kept receiving invitations to join FB and finally joined as a bit of an experiment to see how many of my business vs personal contacts would contact me on FB. I thought it would be weighted towards personal, and that FB was considered a bit 'lightweight' as a business tool.

Have to say that I was dead wrong, as almost all of my business contacts can be found on FB. It has become almost a de facto communications platform among tech entrepreneurs and investors. Additionally, David Kirkpatrick of Fortune Magazine is writing a book called The Facebook Effect...Les articles de The Facebook Effect, by David Kirkpatrick | Facebook

Some interesting commentary to be found there.

I try to keep my personal info pretty well scrubbed. HR and recruiters are using the internet quite a bit now. Here are a couple of funny stories:

Losing Facebook Is Worse Than Losing a Job president of facebook

CNN Political Ticker: All politics, all the time Blog Archive - Obama speechwriter Favreau learns the perils of Facebook - Blogs from CNN.com

CashMc