greg said:

People who are newer (or newly-energized!) are welcome to look at viable methods for delivering some of this functionality. Beware, though: it's a larger and more complex problem than you might guess at first.

perhaps it would help if you laid out the complexity of the problem.

Some folks will even remember that I offered a "bounty" reward for completely functional applications. This offer still stands.

perhaps if you were clear about the capabilities you want to deliver, rather than the means of obtaining them, you might have better luck. -bowerbird