A friend pointed me to this great film trailer iPhone application which does exactly what you expect: List all available trailers with some context information about the movie, shows the trailers, makes the downloadable to a local archive, select between European countries and thus languages, search for titles or other tags like production company genre and so on. Very recommendable!

And here’s the trailerapp trailer:

Developed by filmtrailer.com (Preview Networks) with xTreo