Is RailsConf in fact cancelled? The website still shows it happening in May, and DHH doesn’t say anywhere that it is cancelled, except maybe the title of his post?
I think the point is badly presented, but I conclude that there will be no Rails Conf for _him_.
I read the post as DHH saying he won’t attend RailsConf. The conference can still happen without him. You could read the title as “No RailsConf [for me]”.