Hey there, I checked last night to see others asking about this problem so I'm glad I'm not alone with it. While one person resolved the issue by reloading Chrome, I don't use that and this problem did not go away after going to bed and shutting the pc down completely, so a quick restart of Internet Explorer won't do the trick.
I have a list of some 60 blogs I've been following and last night only two of them would show up at all, both a .com and they have no initial connection to wordpress (I had to type in their sites manually on the subscriber page). Today I can see two more, again both .coms and not .wordpress'es.
I can see posts going back over a week or so, and last night with only two sites popping up I could see as far back as three weeks before the "we can't show you anymore!" or something similar popped up at the bottom of the pile. I *know* of the 50+ other blogs I follow that they update more often than once every month so it's gotta be something to do with the site and not their end.
In summary, I cannot see any blogs that I am following that post via wordpress. I've been busy this week so the earliest I noticed it was last afternoon, but I have not changed anything to have caused this. (Didn't tinker with the layout or my settings or anything, I just made a few posts as usual and poof. Can't see what my buds are up to. Shenanigans, I says! XD)
I know it has been reported by others and the people in charge are aware, but they mentioned *all* of their sites didn't show up while I do have some outside of wordpress that appear. And that I have this issue as well, of course ^_^