Well, as I (and Hatter and Sebastian and a few others have found out), Disqus is nice to look at, and comes about 85% towards working well, but is leaving a few people out in cold. Not sending email replies when people are asking for them, not synching all of the comments back to Blogger (at least, not in a timely fashion), not displaying everyone's comments (sorry to TheGreatWhiteDope and anyone else that might have happened to.
Long story short - there was a lot I liked about Disqus, but to quote the man himself, "I do mind, the Dude minds. This will not stand, ya know, this aggression will not stand, man." The bad news is no more replying by email (god, that was awesome) and no more nested replies (I have faith that Blogger will install this feature soon), and there are some comments from the last week or so that haven't made their way to Blogger yet (like on the movie logo post, which now shows zero comments). I've not had Captcha in some time so no fear there. The good news is, lame as Blogger's system can be, it's certainly reliable and delivers what it promises, and I'm fairly sure those missing comments will be there eventually.
Sorry for all the dust that was kicked up....back to normal.