Like you said...it'll always be too soon. And that might be a problem. Like all tragedies, you must overcome it and live your life to honour the rest. Not forever mourn them. Live your life in a way that would respect them. If hollywood decides to make a movie out of the tragedies (which they have and will)let them. The same way Spielberg's "Schindler's List" brought honour the those who died/survived because of the holocoust...so too (hopefully) will oliver stone and the other guy who's directing "United 93."

If you are still uncomfortable with the idea of watching the movies...then don't go. But don't throw stones at those who do. Don't throw stones at those who want to make this film, especially for a good reason. Because if you are going to throw stones at these artists then i can have a list of other artists who have "lined their pockets with money" making movies of tragic events. hell, first name on the list would be Steven Spielberg. (I love Schindler's List, and i think it was a labour of love.)