Hi,
I've released a new version under http://sourceforge.net/projects/jmapview/files/jmapview/0.4/jMapView.zip/download. It fixes the southern hemisphere bug, allows to set the UDP port, change the color of the plane track & displays speed and bearing of the plane.
There are a couple of other changes / improvements under the hood as well. I'd like to thank flash666 from Sourceforge for making commits and getting me to work on this program. As always: any feedback, criticsm... is most welcome.
Best regards - Clemens