Hi there,
Definitely oil crises will affect also Wizzair but I think they will maintain their plans and move forward. I believe that Eastern Europe its not so weak and people we'll continue travel around even if they must pay higher prices. Fuel price it is affecting not only airline industry and traveling by plane will be more expencive but there is no doubt that is also much more faster than any other means of transportation and we all know that everyone nowadays live against the clock. As for turism, people in ex comunist countries are just now starting (more or less) to enjoy spending vacations abroad and I'm sure they wont give up easily to this even if they must pay more to reach their favorite destination. Also the prices for routes inside country (at least in Romania) are competing with railway transportation prices, the advantage being speed and confort.
I have noticed an increase of wizz prices starting with august but are still affordable and competitive.
Anyway, time will tell....