Jim Reverend
I can't be certain without trying it, so you're my Guinea Pig. But,
just based on poking around at this and that, it looks like Disqus
will allow response via email too. So... we're about to find out as
I'm responding to this via email.
I'll let you know what I decide in a future post. Looks like JS-Kit is
another contender worth trying out.
As far as regaining the threading from your original comment system...
that might be a bit more difficult. However, if I can get my hands on
exactly what Disqus/ID/whatever is looking for in the way of an import
file, I may be able to help you get threads out of the data you have.
Also... I think Disqus has a way to "claim" comments too. Not sure
though. You left your comment unregistered (which would be the same as
it would be imported, I would guess). So, go try to claim this comment
now and see if it works.