A few notes on the app.config file to help you set things up
TwitterAccount and TwitterPassword are pretty obvious. These need to be the account and password information for the twitter account you want status notifications sent to.
PublisherMethod should be either Twitter or Delcom depending on your choice of notification.
TeamFoundationServerUrl: The address of the TFS server. I know, surprising isn't it :-)
PollPeriod Build status information is monitored via polling. This value is the milliseconds to wait between polling. Default is 1sec (1000msec)
TFS 2005 Support
The application is built against the TFS 2008 assemblies. Team Explorer 2008 is required to run the application. The Build Monitor has not been tested against the a TFS 2005 server, though it should work OK.