I just downloaded a browser my brother sent me the link to call Flock. I just now set it up and am posting this post via the integrated blog component built into Flock.
It also is cross platform, I am running the Linux version right now on my Ubuntu 6 laptop using the 0.7.0.17.1 version. It works great and was as simple as uncompressing the .tar.gz and running the ./flock executable.
Check it out at their website.