I've cobbled up a PHP script to send status messages to your Facebook, Twitter and Jaiku accounts simultaneously. All you need is a PHP environment to run the script and accounts for each service; these values are set in a static array near the top of the file. If you don't have one, then just leave 'em blank. The code will just skip over.
I've also added some YUI goodness to make the experience a bit more bearable.
You can grab it at: http://api.yahooza.com/download/status_updater.0.1.1.2_5.php.zip
Much thanks goes to thse folks who did most of the heavy lifting:
http://www.nexdot.net/blog/2007/04/20/updating-facebook-status-using-php/
http://www.modaco.com/Updating-Twitter-status-t250376.html
http://devku.org/docs
http://developer.yahoo.com/yuiLabels: facebook, jaiku, php, twitter, yui