I get 550+ miles to a tank in my 3 year old VW diesel Jetta DSG, My bet is that this will be 6 - 700 miles by the time this battery technology arrives. The downside to this car is that its so high precision (common rail injection etc.), it can't use biodiesel :(

The things Microsoft will do to make you upgrade to Vista :)

I got a quote from a UK company 2 years ago, some #1000 per KW of heating/cooling. Needless to say, there was no interest.

This was due to the compressors and pumps needed, there is also a high maintenance overhead as well

It is highly dependent on water movement through the soil structure, so putting one under a car park is a no-no.