Down this evening and still late this night and early morning, all these sites and more…
…and what they have in common is that they are all bunched up on one host: too many cooks and all, as the saying goes.
Because, otherwise, if not the host they all have in common, it’d be a strange phenomenon that this particular group of blogs would all go dark all at the same time for otherwise issues not related to their hosting services about which they all have in common. Smart bloggers all, up to a point.
So the obvious conclusion is, their recurring “downage” is related to the host they all share. It’d be smarter to host the sites on different locations, for starters, because the downtimes for these sites in their current situation recurs with some frequency that is abnormal for acceptable hosting.