It has been a long time in coming... but the day is finally here. Ubuntuzilla now includes both 32bit and 64bit builds of all three major mozilla package releases (those being Firefox, Thunderbird, and Seamonkey).
It appears that official ubuntu repositories are bent on lagging behind on new mozilla releases, so for the foreseeable future, Ubuntuzilla will continue to provide the latest mozilla software releases.
(And in case anyone is wondering - yes, that means I am now running a 64bit ubuntu because I got a new machine, so I finally had to scratch that 64bit itch. :) ).
Thank you all for sticking around, and coming along for the ride!