I've just downloaded and started playing with Flock, a new browser which is integrated with various types of online services like flickr, del.icio.us and blogging tools like WordPress (I'm actually writing this through the Flock blogging tool).
I've only been playing with it for a short while, but my initial impressions are that it's pretty damn sweet.
It allows you to post things straight from flickr, downloading your photo stream and showing it to you, so there's no need to go to the flickr site and grab the photo url or the code you want to paste into your post, you simply have to drag in the photo!
Anyway, I'm impressed and you should get yourself a copy to try it out.
- Chris