Don't worry, it hasn't disappeared. I just dumped it in Scraps to avoid confusing folks :[link]

As of this moment, practically nothing. I've got my photo ref guides put together for every episode of season 2, and I've incorporated some of the more critical elements into my latest version of the map (only accessible by the links at the bottom of my latest journal... Probably should just update the DA gallery image at some point). However, even in the latest version, I've only had a chance to fully analyze season 1, and I'm still working on my second pass through S1 after finding a few critical mistakes in the mapping. Mostly a lack of detail. Anywho, tl;dr - if you want the latest and greatest version (and updates on my status) keep an eye on that journal. I update it every time I make a change.

As of this moment, my answer is yes. And no. The maps here in the "Map of Ponyville" folder are my Version 1 maps. They only incorporated information from Season 1, and are almost as accurate as you could possibly have gotten from just those episodes. Version 1.5 on the other hoof (currently accessible from the bottom of the current status journal on the front page) is considerably more accurate as it incorporates elements from season 2 as well as a much more practiced eye's lookover of season 1.

Long story short - Whenever I release a new version of the map of Ponyville, I'd stake my reputation on it being the most accurate map available to the public at that time. (And yes, that does mean these older maps become very obsolete...)

a) When they stop making episodes (which hopefully won't be for another couple years from now)
b) When I can find the time to work on it again (university work is crazy!)
c) When I stop using all my spare time to read ponyfics and surf Equestria Daily.
d) All of the above

Take your pick? Hopefully it'll be sooner than later on b and c.