Freesound.org style thumbnails in Gnome
I hacked up wav2png so that it works as a Gnome thumbnailer. Pretty nice.
I've since switched to Windows 7 and I really wish there were an easy way to do this there, too, but I've looked into it and writing a thumbnailer seems to require learning a new language.
If anyone wants to do it for me, let me know. :D