Below is a link that describes publishing related summer internships in Boston. For business students, there may some opportunities - probably mostly in the marketing and operations area. Please be advised that this link does not specifically identify current openings - just publishing houses that have hired interns in the past. You may wnat to poke around their web sites or send a letter of inquiry and resume to a chosen few.
http://www.theatlantic.com/about/bosintern.htm
