Yesterday was much cooler and the wind was an easterly breeze which cleared the smoke.  We also received a light shower at night which dropped 0.4 ml.  Not enough to settle the dust, but we'll take any moisture we can get at this point.  Much more tolerable.
Tomorrow, Friday, is still the worrying day.  39C and 50km/hr winds from the west.  No rain expected for the next week, except the chance of some very light showers.
The only fire of real concern to us is West of us and about 20km away, near the Tahune airwalk.  It has burnt out about 1000 ha (2600 acres) and is rated as "Going": i.e. not contained.
The Tas Fire Service website says that an aerial response to the fire starts today.
I drove from the house, across the paddocks and out our escape route just to make sure it's clear in case we have to use it.  Otherwise, our only road route takes us west through forest.
Anyway, still hoping that everything goes well.
There's a couple of much larger fires in the middle of the state which are threatening  some small communities, so our thoughts are with the residents and the firies who are battling those blazes.