Boston related links:

Massachusetts Office of Travel and Tourism
BostonUSA!
ArtsBoston

Early music links:

Boston Early Music Festival
Early Music America
Handel House Museum

Links to other non-profit arts organizations in Boston:

American Repertory Theatre
Boston Ballet
Boston Lyric Opera
Boston Symphony Orchestra
First Night
Celebrity Series of Boston
ICA
Gardner Museum
Huntington Theatre Company
Lyric Stage
Museum of Fine Arts