use GStreamer with Gnome Virtual File System

Again, rather trivial but mentioned nowhere:

To use your GStreamer application with the Gnome VFS (alias GVFS), just install gstreamer0.10-gnomevfs (or similar, depending on your distribution).

Otherwise, for example, Exaile will do just nothing when you drag-and-drop files from a SSH-/WebDAV-/… connection in Nautilus into your playlist.