Currency choices

I would like to have an option to specify the currencies selectable, ie I can now do this:

    price = MoneyField(
        verbose_name=_(u'price'),
        help_text=_(u'Price of the prototype, changing it does not affect any already sold tickets.'),
        default_currency=DKK,
        default=Money('0.00', DKK),
        currency_choices=[(DKK, _(DKK.name))],
        decimal_places=2,
        max_digits=12,
    )