Best place for coffee in Huonville is The Local. Stocks some great local produce including the ever elusive Huon salmon. Great carrot cake too!
You'll find The Local left off the first roundabout over the bridge - if you were heading towards Hobart. It's the street which has the great antique shop (a rambling house filled with junk), the op shop that doesn't open when it says it will, the CWA which is only open on Fridays and the Red Shed which we never got to (it was elusive like Bruny Island). Oh and it's the street with the skate park. Not joking.