Here is a post from dAlen about Flock, the Social Web Browser. If you blog, use Twitter, Facebook, Flickr, or YouTube you will want to check this browser out.
Flock also provides tools for bloggers and other users who want to create content—and that’s where this browser really shines. If you run a blog, you have the option of inputting your log-in information for a number of common weblogging hosts and services, such as Live Journal, Movable Type, or Blogger. Once you’ve entered that information, you can click on the browser’s Blog option to launch a pop-up window that is preconfigured with your weblog’s categories and posting options, and also provides space for writing an entry.
Download Flock 1.1 for Windows, Mac or Linux
– MacWorld: The Browser Bunch