In case you haven't noticed already, Javablogs now supports weblogs.com-style pings, so you can automagically tell it when your blog's updated.

Moveable Type users can just add http://javablogs.com/xmlrpc to the "Notify these sites when I update" box in Weblog Config -> Preferences. A bunch of other blog tools support the API as well, but having never used them, I wouldn't know how to configure them.

Please read the documentation, because there are one or two gotchas.

(I find this vaguely amusing, since this is a feature I requested myself seven months before joining the company. Then again, I'm easily amused.)