There is a group called Photo-Resistance (with a French pronounciation of resistance) that has gallery space in a couple of New England galleries. From what I understand you can lease space for a print or two and they will hang your work for exposure and sale. I think a membership fee is supposed to provide certain benefits such as having your work included on a CD of all the members work. I don't have the web address handy but a quick google search should provide it.