The post mentions that Wolfram can convert $'s into British pounds (and other currency conversions) - I just wanted to mention that Google can already do this too! It's actually a fantastic tool for all sorts of conversions. Just type into google, for example, $67USD in British Pounds (or whatever currency you'd like) and the first answer at the top will be the conversion. It works for measurements (e.g. x cm in inches)and weights as well (x pounds in kg). I'm not dissing Wolfram, I just wanted to point out that the feature wasn't unique.