On Sun, 15 May 2011 18:16:31 -0400, Jesse Rosenthal <jrosenthal@jhu.edu> wrote:
> It's possible, and works the way you'd think it would -- just select a
> bunch of threads in the search list, and then tag them. It will apply
> the tag to the messages in the region. (In fact, tagging a single thread
> is just a special case of this, with a one-line region.)

I think this is only a subset of the requested functionality, since one
can only tag consecutive threads at once.

-- Daniel