If you're a social networking addict then you'll probably be a bit annoyed with going back and forth between applications, logging out of one while logging into another.
EventBox has been designed so that you can combine web applications like Facebook, Flickr or Twitter into one convenient application. At the moment, it supports all the major sites such as Facebook, Twitter, Flickr and Reddit and it also includes an RSS reader for all your feeds as a bonus. The EventBox interface is incredibly slick and elegant using every ounce of your Mac's graphic capabilities to produce some stunning effects.
The program supports Growl alerts, audio alerts and dock alerts to notify you when you've received a new message on one of the sites. This is especially useful for viewing new photos that have been posted as EventBox allows you to view them, whichever application they've been posted to, without leaving the program.
EventBox is an elegant, if slightly over the top application, which brings together the best of social networking sites. Just don't expect to get any work done if you receive lots of alerts daily.