I would really love to have the SubSonic media streaming server ported to the EX4. SubSonic runs on Linux and only requires Java to be installed. With SubSonic, you can stream audio and video media to any device all over the world and supports user accounts, libraries, playlists and much much more (such as mobile apps).
Subsonic is really fast as it indexes all music in a format that is easily searched through. Twonky is way too slow for the amount of music I’m placing on my NAS - I need SubSonic.