ashb: Yes, that'd be good. E.g., #17: "the Cape Verdean escudo, like the former Portuguese escudo and French franc, placed its sign in the decimal position (i.e., 20$00)" from http://en.wikipedia.org/wiki/Currency_symbol
@jleader: good points. I note that the IDR isn't strong enough to buy a Unicode codepoint, like most other currencies...:)
Same remark to @garu, the cifrão is originally written with 2 bars (while the dollar has only one), but it has no separate Unicode codepoint. It is, however, much older than the US dollar, and it's its origin.
@MartinThoma The example used in #4 also works for #3, since #4 is a more specific version of #3. The Wikipedia page for MGA lists denominations like 1/5 and 2/5, so presumably you'd talk about 1 1/5 ariary rather than 1.2 ariary. But the website of Madagascar's central bankdoes list these coins in a decimal format, as ARIARY 0,4 and ARIARY 0,2, so maybe Madagascar has switched to a decimal format since this Gist was written? I don't know how the currency is actually used in practice.