Thanks Emmanuel,
I have this plugin, that's how I can allow currency choice on my website.
BUT... it does not let me configure the SYMBOL that will be shown near the currency. It still shows as the SHORTNAME of the currency (USD, EUR, GBP, etc).
What I suggested is the possibility to choose whether I want to show the letters OR the symbol, and the order that they'll come (number - letters / number - symbol / symbol - number / letters - numbers). See what I mean?
So far, the way the currency is shown is configured at "Languages" configuration. Not practical for international websites...