My intention with this thread to is offer confirmed (evidence based) information on existing and new supercharger locations in the Northeast AS WELL AS TO offer encouragement to Tesla to remedy the dearth of SuperChargers in the region. This is a huge and relatively compact market for Tesla: the population of the Northeast is 56 million, 18% of the total USA. Yet, the population centers of Boston, Hartford, and Philadelphia are inadequately connected -- and links to Montreal and Toronto are completely missing.
Just 4 new superchargers will do this:
Sturbridge, MA (should be a no-brainer)
Edison, NJ (which is underway)
Albany, NY (who knows what is going on there)
Canandaigua, NY (midway between Albany and Toronto) (This would also serve Buffalo and Rochester)
High payoff for 4 new SuperChargers (one of which is underway, so really 3). How 'bout it, Tesla?
UPDATE: 07/17/2014: if you add the population of Quebec and Ontario, this area is home to 77 million people. But much of the area remains WAY under served. Grateful for Tesla Motors recent post that the Quebec to Toronto corrodor is scheduled for Superchargers but this needs to be connected to the 95 corridor. When complete, a potential market of 77 million people will have access.
UPDATE 04/13/2016: It's taken a long time BUT! a minimum coverage of the Northeast is finally in sight! Two SCs are currently under construction, Harrisburg PA and Southampton NY. The Harrisburg site is critical for connecting Pittsburgh to Philadelphia on the PA Turnpike. There are five -- 5!! -- other SCs under permit, two of which will solidify connections between Montreal and Quebec City to points south (like Albany, NYC, and Boston). The other three make things easier between Buffalo and Cleveland, the MASS Pike, and finally, the one way up in Rivière du Loup, QC, where my Grandfather happens to be buried (honest!). I have been very critical of lack of progress to date so it's important to give credit when due.
Last gap is the I-80 corridor in northern PA to connect Ohio and Pittsburgh to NYC and all points further to the east.