I'm still here - just working around the clock on my new business which launched in June last year, trying to get it to the point where it is financially sustainable so that I can afford to spend the time upgrading my other sites like ZooChat.
Are you not getting notifications for updated threads that you actually expect to be receiving, or is it just that post volumes are down a bit and things are a bit quiet?
Let me know if there are emails you have been expecting but which haven't been received.
Also, just a heads up - I will be changing the system we use to deliver emails probably today or tomorrow, but I don't expect that to have much impact, should hopefully just be business as usual.