Three little websites to help you deal with "intimate" issues

When people brainstorm business ideas online, they usually put "private" features at the bottom of the list. The reason is that private means it's a secret, not public, not made into a plugin, not bringing new friends, not attracting strangers, and not creating a snowball effect. However, now websites are also beginning to embrace some "private functions." For example, social networking sites like Multiply and Plurk have started categorizing friends and setting different viewing permission levels. People are starting to realize that a website doesn't have to be public; as long as each member uses the site to connect with their 10 friends, the website can still perform very well. It may even perform better than before.