Hi. I am a Boston area comic creator, and I can point you to some more. Words and Pictures is now web-only. Their URL is http://www.wordsandpictures.org
The Washington Street Arts Center in Somerville has good connections, as they are running a "comix week" event (in September, I think). They can put you in touch with other local folks. They are at http://www.kickball.com/wsac/main.html
I can give you email for some folks if you drop me a line at email@example.com, but WSAC can give you a superset of the contact info I can give you, so you might just want to talk to them. Plus, you might want to coordinate something with their event. Are you in town, suburbs, or western MA? I know creators in NY and VT too, but of course it'll be a lot harder to get them to come out.
Gareth Hinds www.thecomic.com