I keep a request for uploading sound files (wma, amr, mp3, midi etc). animation-file in gif format is being already allowed (and helpful) , but some-other sorts of video files (video recording files) such as mp4, AVI, 3gp, etc. within a strict limit of file-size and time.
At the same-time, amazingly small SVG files (for still-image quite like png-s and gif-s) from wikipedia, could not be directly used here. If the spectrum of allowed formats for still-images slightly broadened, this website will basically be benefited.