Oops, looks like I missed something. Brian, Maltes, are you referring to lc_monetary_currency using currency symbols instead of ISO 4217 codes?
If so, perhaps that should be left to acs-lang catalog entries, since most currencies do not have a unique sign: http://en.wikipedia.org/wiki/Currency_sign Or perhaps, the table should be expanded to have a currency sign associated with a locale, realizing that the "$" would have different meaning/values in different locales.