Locale Ping.fm Plug-In Pro 1.0.6
the author of this app says:
With the Ping.fm Plug-In you can post to or set the status of all your social networks like Twitter MySpace Facebook Brightkite Google Talk AIM Wordpress Blogger automatically based on conditions like Location. http://ping.fm/ account and the App Locale or Tasker required.
Locale Plug-in - it will not run without Locale or Tasker