There was a forum discussion on Channel9 the other day about petrol (gas as the yanks call it) prices outside the US.

I had no idea what the current price in US$ per gallon over there was, nor did I have any idea how to convert our price (AU$ per litre) to theirs. So I jump onto Google, and after some stuffing around, worked this out:

1.38 aud per litre in usd per gallon

How awesome is that? It's doing currency conversion and measurement conversion (slick, easy-to-use metric to clunky, archaic US) in one query. Unbelievable.

And yes, Google Calculator still knows that e^(i*pi) + 1 = 0!