Performancing for Firefox has released version 1.1 of its very impressive add-in for Firefox. It is a full featured blog editor that sits within Firefox, and makes it very easy to bash out a quick post while you are browsing. It is especially useful if you are mainly a "link-quote-comment" blogger. Easy to install (and uninstall if you don’t like – but trust me, you won’t want to.)
This seems to me to do most of what I would have wanted from Flock.