Here is a website that I found a while ago - it was created by two Lithuanian organists dedicated to helping others learn to play and improve their organ skills.  There is a mailing list of weekly hints, skills, and random organ topics that you can subscribe to receive.

I figured that I would pass this on, as the organ community seems pretty tight.  Even on their website they mention practicing on noiseless keyboard simulations made of paper...I think that they need Organteq!