I've not seen any posts from him in a while 
Health issues? Did he leave?
According to his members page - last active 2 march. That is only 10 days ago. Maybe he is having a holiday. I, too, somethimes get a little "fed up" and let ArduinoForum survive without me for a month. It does.
OTOH nice of you to worry.
Maybe Nick is the Mod who gave up in frustration?