Yes. Regardless of how that function is actually implemented, it will end up also being in a User Preference setting (for those unwilling to brave a custom killfile.)
I'm going to try to give a very simple interface to the killfile on threads and such, and an advanced interface a click or two away for the power users.
A calendar index would be nice, so we can find threads by date. Or just periodically update a zipped up index:
Date -- Linked URL -- Title