Nothing special about it, in fact it can be used as a small float - holds 4 (or is it 5) dp's, which is the most regularly used precision for currency calculations (eg if VAT is 17.33% multiplied by £0.17, the precision required for storing the result is 5 [or is it 4...?] dp)
Not sure about Dayve's suggestion - for this to work you would need to store the cents value - but you would lose precision in the above example.