I am no coward but I am not foolhardy either. Flying airliners involves making decisions that err on the side of safety. You always go for the safest option. If that means we sit on the ground for a few more days until more solid information is available then so be it.
When the engine and aircraft manufacturers say it is safe to fly their products in the conditions, then and only then will I consider getting into the air.
However I suspect aircraft will be grounded by airline's insurance companies. Until insurance companies give the OK, which airline is going to risk flying? A hull loss that isn't insured could bring an airline down.
For those who are so eager to jump in an airliner and go flying, and claim there is no problem with that as there have only over been the 2 publicised incidents, may I suggest you have a look at this information from Boeing:-
Aero 09 - Volcanic Ash Avoidance