I feel exactly the same. Receiving the latest posting 'from' John gave me a bit of a jolt, and although I read through all of his wise words (and funny quips) I couldn't help feeling a little sad. I had always promised myself I would ask John this question or that question and was slowly building up my courage to ask for his advice/help regarding a novel that I have been working on for some years now. Pathetic, I know, and I really have no idea what held me back. Carpe diem comes to mind (stupid banana another).
My promise to myself now is to just - Go for it!
Thanks again, for all your work on keeping the site running.