Dear Brad,
While your working on the LaTeX bundle, I thought I would mention a couple of things.
First, the "Keep log window open" checkbox is working imperfectly for me. I checked it and it kept the window open. But unchecking it, the window still remains open.
It is less than optimal that the engine and options work independently of one another. If you have options set for pdflatex and the switch your engine to xetex, say, these options persist even though they may not be valid options for the selected engine.
It would also be nice if the user could save options and select among them instead of having to retype them.
Just some thoughts.
Thanks for all the hard work. I am definitely enjoying the new Typeset and Preview command.
All the best, Mark