The Mobile Manager for Netflix allows you to add, remove, move and watch trailers for movies in your Netflix Queue. I just did a little bit of testing on the app and it worked just like you think it would. I was able to remove a few movies, move a movie around in my queue, and add a new movie to my queue easily and all in about 5 minutes time.

The preview trailers are surprisingly clear and even while I was in a low signal area I still was able to buffer enough to watch the trailer well enough.

This is a free app from Microsoft but you have to have Microsoft Livean account with to download it. I also had to fill out a small form before I could download the app (I didn’t see any way to skip that even though I had a Live account). For all the prerequisites you have to do you’ll be ready to add and remove movies from Netflix at a moment’s notice!