I would really like to be able to drag and drop some files from file-roller directly to other applications. That means, this file would be extracted to temp directory and than opened in the application you dropped the file into.

For example: You downloaded the subtitles for a movie but they are zipped. So you just want to simply drag them from file-roller and drop them in your video-player (vnc/smplayer).
You don't really want to save this subtitles to the specific location, you just want them once.