The website for the Boston Fire Department is here. The Massachusetts Memorial to Fallen Firefighters is scheduled to be dedicated on September 11th. You can support the memorial by buying a brick here.
UPDATE: A fund for the families of the two fallen firefighters has been created:
West Roxbury Fire Fund
Boston Firefighters Credit Union
Boston Firefighters Credit Union
60 Hallet Street
Dorchester, MA 02124
617-288-2420