SHARING and communicating are essential components of being human. But as celebrities like Britney Spears and Charlie Sheen have shown us lately, there is such a thing as over-sharing.

Still a new generation of Web sites like Dscover.me, Sitesimon.com and Voyurl.com is banking on our willingness to take that next step toward taking our lives public: namely, by automatically tracking personal browsing histories for public viewing.

Paul Jones, a founder of Dscover.me, said he and his founding partner conceived the site because they were old college friends and wanted a way to better share common interests, from shopping finds to tech news, while living in different parts of the country.

At times, their communication would drop off, Mr. Jones said. “Then, at one point we just said to each other, ‘What if we could just show each other what we’re reading and watching and shopping for?’ ”