Visualizing electric charge field

Sometimes I just get carried away with the visualizations. Cause even if I can't get the physics right, at least I can make a really cool looking demo. This one shows vector lines visualizing an electric charge field thingy. The different spheres have different charges. There is also an isosurface that is visualizing the surface where the electric field is equal to a certain constant. It all animates in real-time and I can even use the Nintendo wii-mote to move the charge points. Yeah dude.