The Massachusetts building import was completed this week.

osm.wiki/MassGIS_Buildings_Import

Massachusetts has virtually all of its structures mapped in OSM now. 2.1 million structures were imported.

There is an address data layer being released this fall from MassGIS.

http://www.mass.gov/anf/docs/itd/services/massgis/massgis-addressing-workshop-slides-with-notes.pdf

Hopefully we can get addresses on all of those building this year.