Sad news :-(
I never worked with him as an editor on the projects themselves, but I several times interacted with him on meta, where he has the habit to edit without being loggued (making it pretty hard to find back his comments). How, he used to sign his comments :-)
I found for you a message from the past, from Mirwin. http://meta.wikimedia.org/wiki/Worst_cases#Synopsis It is a good message.
I wish you the best. Take care of yourself.
Anthere aka Florence Devouard