As some of you may have noticed, readers of this here blog can't post comments without registering with TypeKey. The Big CH Mijefe has implemented this change in order to save the CH servers from ruthless hordes of spamming robots from former Soviet republics. Registering with TypeKey is free and painless, so that in and of itself is not a big deal.
Unfortunately, a side effect of the registration requirement is that, at certain times and for no apparent reason, people aren't able to comment at all, registration be damned. If this happens to you, all I can say is please try again later. That seems to be the only solution at this point, and has worked for other people.
I really like getting comments, so please be not discouraged.
UPDATE: I've added the handy-dandy Meebo thing as a proxy for comments for the time being. We'll see how that goes.