There are several money order laws that apply to merchants who accept them. Bitcoin seems to have properties of a money order, but also some aspects of value that are driven by demand.
I'm looking for a clear and reasonable explanation of:
How do Bitcoins compare to (and differ from) Money Orders?
What aspects of laws that apply to Money Orders are likely to also apply to Bitcoin?
I'm most interested in US, UK, and Australia, but any links would be beneficial.