Sampey,  any chance you could add an option when a ping-pong is complete to send a Growl (GNTP) notification?  Since there are Growl apps for pretty much all platforms, including mobile, it might be a neat feature to offer.  There are Java libs you already built, so it shouldn't be too much to implement, you can find them here: http://www.growlforwindows.com/gfw/developers.aspx