Excel have a currency convertion tool linked to a live cur conver.
 

It would be nice to be working in excel with a currencey and if you had to
convert to another currency you had a tool that with the right parameters
would convert it for you. It would have to be linked to a live internet
currency convertion.
The parameters could be 'currency from', 'currency to' and the dates for the
convertion. The default on the date could be the current day.