Michael McCracken recently posted [1] some small (non-TM) hacks for displaying text. His TextShape tool is pretty cool, and TextStructure reminded me of Gerd's TmCodeBrowser plugin, though it adds the neat feature of marking up the symbols list with little pointers as you navigate through the file -- pretty cool.
Anyway, I started exploring tmcodebrowser again, and I whipped up a couple of tiny, trivial lines to add to one's ~/.ctags.tmcodebrowser file to add support for GTDalt. If anybody's interested, the following will just show in the codebrowser window a list of projects in the current .gtd file -- just one more way of displaying your GTDalts, beyond Haris's great remind/geektool displays. It's handy if you want to keep a snapshot of the overall set of projects in a very long .gtd file.
--langdef=gtdalt --langmap=gtdalt:.gtd --regex-gtdalt=/^[\t ]*project (.*)$/\1/project/
[1] http://michael-mccracken.net/wp/
-Alan