Here are some links of calligraphy and book arts organizations that have been helpful to me over the years.

Pacific Scribes
Santa Clara County, California
Friends of Calligraphy
San Francisco, California
Bay Area Book Artists
(also called BABA)
a book arts group in the San Francisco Bay area, sponsor of the Book Arts Jam
Pacific Center for the Book Arts
San Francisco-based book arts group
Guild of Bookworkers
national bookarts guild
John Neal, Bookseller
a supplier to the calligraphy and book arts world, also the publisher of Letter Arts Review, and Bound and Lettered
Paper and Ink Arts
a supplier of calligraphy supplies and books