I am from Massachusetts. I don't know of any quilt shops directly in Boston, but there are a few outside of Boston
Franklin-Emma's Quilt Cupboard www.emmasquiltcupboard.com
Cambridge-Cambridge Quilt shop www.cambridgequilts.com
Arlington-Fabric Corner www.fabriccornerinc.com (this shop is great, they have a great selection of batiks, cottons and specialty fabrics)
I have an email out to my guild to see if anybody knows of any others. I will get back to you if I find something out.
Sandi