Leaking Coolant Question

I'm new here, because I've just purchased a 330Ci - love the way the car handles! I'm having some coolant leakage - I've already read the threads about the usual suspects like the pump, tank, etc. and I've ordered all those parts so that I can do that project. My question is - are there other hoses that are not on the front of the engine that can leak coolant? My car leakage seems hard for me to understand. Wherever it leaks from, I can't see it. It doesn't always leak, but once in a while, after the car has sat and cooled I will look and there is a puddle. The car doesn't overheat and it never seems to leak more than a pint of fluid. This just seems strange to me - could this still be the pump, or are there hoses or other ways the car could be leaking that are not on the front (tank, radiator, hoses, etc.)???