It would be great if there would be a project tracker, and if it's just a list / Google Doc/Spreasdsheet you update, that shows what you are working on right now, what you need help with and what is prioritized next. It would help the community to understand what is going on and what to expect as well as plugin developers and potential contributors.
Also just a few tiny things that I noticed in the style guide - feel free to ignore them ;)
1. "I also use actual tabs now, instead of spaces."
This is bad. Why? Because my vim is set up to 1 tab = 4 spaces. So all my lines will be longer than your lines and the 80 character limit is off. Use spaces. Either enforce 8 colums or 4. Don't use tabs, as it implies that every developer uses the same setup / remembers to change it every time.
2. "Also, it makes for much cleaner viewing in certain editors that wrap (like vim)."
:set nowrap
#justSayin
Keep up the good work, awesome progress! I'll try to get it running on Windows soon and see if I can provide some feedback.