Facebook
 the most popular site
for quick SMS type updates, I have them mirrored in Facebook and MySpace
- MySpace similar to Facebook, more flexible has a different audience
- Blogger like a electronic diary I have several blogs for different things I do.
- Plaxo semi business keeps track of my contacts updates my Outlook and phone when friends and associates change their details
Business Networking
 I have found this less useful than Linked In, you need to put in the time to make this work, a good way of contacting like people.
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