FireStatus is a Firefox extension that aims to be a swiss army knife for dealing with various social networks, right from your browser, without visiting any particular website. Facebook, Twitter and FriendFeed are currently supported, but more are in the pipeline. For starters, it allows you to simultaneously update your status to all or some of these services, so that all your friends see it, no matter what they are using.  
 
FireStatus can ease the task of posting these messages or status updates, by being always available, instead of needing to have the service pages open and without a large memory footprint, like other similar applications, since it takes advantage of the fact that most people nowadays always have one browser open.
micro
bear: once it can update my linkfilter journal I'm in