Please find well-recommended jazz piano instruction books (or any
other medium) that are designed to build dexterity and knowledge 
for jazz piano.

--) One of the things I'm looking for is something like "Hannon
Excercises", except that the exercises are specifically designed for
the jazz modality.

--) I'd like an incremental, progressive regimen that
develops both hands: left-hand comping under solos AND right hand
soloing techniques.

--) I'd also like a resource for learning chord voicings: both a)
two-hand chord voicings and b) left hand voicings for comping under
right-hand solos

I can't really answer the questions that you asked, but, since no one
else took your question up, I'll take a shot.  Here are some thoughts:
1) Take a lesson from a jazz piano teacher.  Even if it is just one
lesson that involves a significant travel distance, during that one
lesson you can set up a practice plan that is optimized for you as an
individual, and takes into account your level, skills, strengths,
weaknesses, and goals.  That way you can progress rapidly with maximum
joy.  And, if you and the teacher are a good fit and the logistics
work out and you can continue taking lessons, you will probably
progress more rapidly with a teacher than without.
2) There is also a section on suggested jazz piano books on
http://www.learnjazzpiano.com.  If the section did not answer your
question, you could post to the site.
3) Consider asking the same question to some jazz piano teachers, such
as a jazz piano teacher at one of the major music schools like
Berklee, or perhaps David Sudnow--although each will likely recommend
a book he has authored.
4) As far as Hanon-like exercises for Jazz, there is actually a "Jazz
Hanon", as well as a "Jazz chord Hanon".  Mel Bay has a "Jazz
exercises for piano" and "Jazz piano scales and modes".  Hal Leonard
has "Jazz-Flavored Scale Patterns & Exercises - Piano" and "Exploring
jazz scales for Keyboard".  There is also a "Daily warm-up exercises
for jazz ensemble--Volume 1 piano" by Mike Lewis and Jack Bullock. 
You could also construct your own Hanon-like exercises by finding a
run/solo segment that you like, and then playing that in all 12 keys. 
You could move up and down within the modal scales, similar to what
Hanon does.
4) You might start by going through Mark Levine's "Jazz piano book",
then reevaluate and see where you are and what you would like to do
next.

Ciao