The social networking site Facebook has laid down new battle lines in the online world, launching 85 applications from third party vendors that make the online experience that much more convenient. 

The applications, from vendors like Amazon and Microsoft, are designed to make it easier for users to shop, play and do business.
An example is the book review application from Amazon which allows users to post book reviews on their profile pages. If people in their network like what they see, the can click on the "Buy at Amazon" button to go to Amazon.com and buy the book.
Facebook won't take a portion of the revenue generated by third parties, which should prove popular in attracting new partners. The company isn't looking at the new moved as a revenue-generating exercise but rather as a means to add more users.
The site currently boasts about 24-million users. It started as a sharing site for students but has since entered the mainstream.