I've got the same issue: coolant dripping from the exact same spot as in the pic; however, I only get that leak when backed into my driveway. When I'm facing up my driveway, it leaks down the rear onto the rear crossmember...I though it was coming from the bellhousing. Anyhow, I'm inclined to think that it is my auxiliary waterpump. I know it leaks, I can see the orange crusties just looking through the intake manifold, but it doesn't leak a lot; and I'll get to it when it warms up outside a bit
Might be the same for you guys..try parking differently. Fyi, I don't have the leak when driving or parked temporarily either, only overnight.

 

Another thing. After much research: the thermostat housing, apparently plastic and prone to failure, is directly above where the leak is on the oil pan. It's behind the alternator. Just thought I'd point that out if anyone wants to mention a location for the mechanic to pay extra attention to.

 

Im taking my car in Jan 4th to have them fix the leak, the mechanic suspects its the water pump. Ill let you know what they find.