I also remembered that our car sharing service here has added Nissan Leafs to its fleet and they must have charging stations setup but I am not sure if they would be accessible to non-fleet cars chargin at them. You could give them a call beforehand to see if you need to.
The wesite with a map of the current locations is Communauto - Electric vehicles for our members beginning in the summer of 2011! Follow the updates of an electrifying project! .