Permanently deleting apps
Currently, when you delete an app from your iPhone, it merely gets removed the the phone, but stays in your list of available apps in iTunes.
So, currently, when you try an app on your phone and decide you dont like it, it remains in your list of downloaded apps in iTunes. The only way to permanently delete it, is to remember to go back to iTunes and manually delete it from there.
I am assuming this is accurate and there is no way in iTunes to see which apps were recently removed from the phone (thereby jogging your memory as to what apps you might want to permanently get rid of.
I wish, when deleting an App from the iPhone/iPad, you were given the choice of "remove from iPhone/iPad" and "permanently delete." I've got way too many unwanted apps cluttering up iTunes...
iPhone 4S, iOS 5.1.1