Sorry for such shameless self-promotion, but hey... http://www.youtube.com/anorgancornucopia (http://www.youtube.com/anorgancornucopia) contains a number of interesting rarities, and will be expanded over the next little while. Incidentally, I must point out that I chose the name of the channel before I was aware that Christopher Herrick had recorded a CD of the same name...
A few other interesting things, too - http://www.youtube.com/user/PasosVideo (http://www.youtube.com/user/PasosVideo) contains a number of examples of unorthodox pieces of music being performed on the organ... the Led Zeppelin and Pink Floyd are particularly appropriate, as John-Paul Jones (Led Zeppelin, keyboard/bass guitar/mandolin player) and the late Richard Wright (Pink Floyd, keyboards) were both organists. Of course, this forum has a particular link through its host to Led Zeppelin...
Lastly, I suggest to anyone who does not already know his music that they go to YouTube and look up Alfred Desenclos' Requiem, Salve Regina and Nos Autem - I discovered them recently and was blown away. A genius to rival Duruflé as far as I'm concerned.
I have managed to acquire Georges Delvallée's huge recording of Charles Tournemire's l'Orgue Mystique. This is now impossible to purchase either in physical or virtual format, so I am sharing it with the rest of the world via the medium of YouTube. To avoid it swamping the rest of my channel (it runs to 253 pieces!) I have created a dedicated account for it at http://www.youtube.com/TheMysticalOrgan (http://www.youtube.com/TheMysticalOrgan). I hope that you will take the time to explore the channel, which, so far, has five pieces on it (one Sunday's worth).
EDIT: Five has now grown to forty (up to the first Sunday after Epiphany), which I estimate to be just short of 16%. I'm listening as I go along and am gradually being converted to this once very unfashionable music.