Today's Startups Type 3: You run the show (and sharing is caring).

Many Startups of today are about you, the user. They are all about the users on the driving seat, running their own show while sharing everything they do with the general public or their firends.

Most of the biggest sites today all rely on user generated content, the content may be text, video, audio, or pictures.

flickr is an online album for user uploaded photos.

Twiiter is a micro-blogging platform where users add and share status updates, twitter asks "What are you doing now?" what ever your answer, it is shared with other twitter user and your followers.

Users upload and share everything from comments, pictures, videos and more.
There are Community built and user generated online encyclopedia like Wikipedia.
Users share their bookmarks on sites like Del.icio.us, simpy, blinklist, technorati and more.