The INOVE real time simulation has plotted ISON's path past Mars, Earth, Venus and Mercury, animating the motion of the planets as the comet makes its death-defying plunge into the solar corona. By switching the view from space to the view we have from Earth, you can use the handy tracker bar along the bottom of the simulation to see which constellation the comet is currently passing through. By automatically detecting where you are located, the model adjusts to your view of the night sky and reveals its location night-by-night.
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Although the visualization has a web-based application, there's also a useful downloadable desktop version that uses the Adobe AIR run-time system. Regardless of installation, both versions run smoothly and provide an excellent insight to the comet's journey.
In short, the Comet ISON Model is a superb tool for tracking Comet ISON and a beautiful interactive animation that will keep you entertained while ISON remains a solar system visitor.