I just had a coolant leak at the rear of the engine, posted this about it a couple of weeks ago...
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It looked like this:

[Linked Image]

You might be able to see the oil leak by taking off the plastic timing belt cover. You can take out the bolts and leave the top radiator hose connected, just pull it back far enough to get a look. If you know what the problem is before you take it to a mechanic, they tend to be more honest (IMHO).