Since January of this year, I've been keeping track of the three maps on Tesla's "Supercharger" website tab (today-northamerica, 2015-northamerica, and 2016-northamerica). The "Today" maps have been very dynamic obviously, since they show the "coming soon" superchargers in gray pins and those can change every couple of weeks. There have been 17 different maps that I was able to keep track of. The "2016" maps have been fairly static, with 6 total image updates including two changes in pin styles only (no changes in supercharger locations). Interestingly, the "2015" maps have also been fairly static, however there was a significant change in the last week, which took out MANY pins in what I believe reflects the inability of Tesla to bring up superchargers by the end of the 2015 per their original plans. The first image below was likely posted on 2015/11/22 since the image suffix was 20151122. However the second image below, which is the current "2015" map on Tesla's site, has a suffix of 201511222 (note the extra 2 at the end there) although it was posted more recently than 11/22 (I checked on 11/23 and it was still the first 11/22 version0. Anyway, comparing the two images, you'll notice that quite a few superchargers that were planned in 2015 are now gone from the latest map. Notably, many pins are now missing in the Northeast, Midwest, Southeast, along highways 1 and 395 in CA, down by the LA/SD region, and in the Northwest & BC regions. I haven't counted them, but it's probably two dozen supercharger locations that were originally planned by 2015 are now being pushed out to 2016. Bummer!