Just read an interesting piece about fuel prices in the UK, quoting London gasoline at 99.99 pence per litre today. The tax on gasoline is something like 80 cents on the dollar, which is part of the reason there are so many diesels. Essentially the tax burden on gasoline steers more toward diesels which are more efficient and carbon neutral. There are still a surprising amount of SUV's on the roads in the UK, but again many are diesels which get two the three times the mileage of the US gasser versions.

Personally I'd love to see gasoline top $9 a gallon here in the US and do nothing but go up from there.