It is only since reading the AlertBox column on the subject that I've forced myself to sit through a few Flash presentations looking for good work. Jakob does a great job of articulating problems customers are often not sure about describing even though they have an intuition that something is wrong. If Flash is the best solution to a customer's problem, go for it. If it is being used for the designer's amusement or portfolio, then do the work for free . Flash is moving more and more to the forefront of High end web development.
Designers have to work harder to provide material that is both engaging and usable.
In that more and more flash based projects will be produced. People are use to using the web as defined in the past by its limitations. Flash for the most part is geared to other designers and flashers. We still have yet to make it professional enough to reach more than just ravers and teenagers. We can talk all day about, can you use it, should you use it, what is it.