why not just pull data from the cellular servers and use that data to track where a trainload of people are at?

It is propaganda, just like the aluminum pans of WWII.

the problem is we need to capture all the waste wood, burn it in reactors designed to produce charcoal, and then bury the charcoal. waste wood rotting turns back into co2 and whatever offgasses the bugs make consuming it.

I am not sure this is practical but we could burn all available waste biomass in large reactors designed to produce charcoal, and then just bury the charcoal back in the ground.

Small Tesla coils are typically run in pulsed mod, with duty cycles on the order of 0.1%. If you wish to run them continuously you need a 100Kw supply for even a small 5-10 foot coil, water cooled electronics, primary coil, and you will need induction heater grade capacitors. How do you plan on getting useful data from high frequency AC, and for that matter, high frequency AC which by nature is a decaying pulse stream on the order of .1-1% duty cycle?

$70,000 per worker is a bit excessive. I can't come up with $30,000 in operating expenses per worker either.

It saves energy if you do it right. Taking an off the shelf PFC corrected server power supply and giving it 140-280 volts dc rather than 120/240 volts ac may raise the efficiency 1-2%, better yet, remove the diode bridge for another 1.1 or .6% improvement. Additionally, removing the PFC input stage reduces the cost of said supply by 15-30%, and feeding it 300-350 Vdc directly will increase the efficiency 4-8% Converting your utility provided 480/277VAC line into 270Vdc outside the building with just passive cooling saves a lot of heat, if by a lot of heat you mean 5-10% Downsides? 200-400 Vdc outlets are expensive. You have to figure out what is the optimal voltage to feed your servers. You may find that a 270 volt supply with the combined surge suppression of 100,000 servers costs more than 10% of your energy bill per year.

No No No This would be a separate database, furthermore, the information is useless to marketing, because the market is saturated, more intelligent marketing is what is desired. And, No, the closest thing to this is "friend wheel", also on facebook. I'm envisioning a "friend wheel" that encompasses everyone on Myspace, facebook, Bebo, and the 30 others, all of which allow you to see an individual's friends.