I think Jon is still working on ST. I think he will probably post something if he decides that he is ever done entirely with ST. I'm not really worried in that sense. I think the general lack of "official" technical support and Jon's general distance from the community are to blame for people's worries. I feel Jon doesn't have an affinity for or doesn't have time to interface with his community much, and that just makes people nervous. I have always felt if he had an official spokes person in the forums that was in the know of the progress of sublime, could hand out official statements, support, post teasers of what's to come, etc. it would help a lot.
I think more so in these recent times, there is an expectation of more lively interaction with companies we buy products from. We expect twitter feeds, facebook statuses, etc. I know that I personally would not care to do all of that, but if I had a company, I would probably have someone who likes all of that doing it for me.
I personally use products that only see an update once every 3 to 4 months...if your lucky. I don't think Jon having a span of 2 months with no release is a big deal. I think if Jon just interacted with the community more, there would be less flack about long times in between dev releases.
I think that is the real problem, not that sublime is still alive or dead, people just want the appearance of it being alive...whether it is or not .