Americans for the Arts
Provides professional development opportunities, news and updates on opportunities for activism, and a job bank
http://www.artsusa.org/
Art Business
Compilation of online articles on the business of art. Reviews and photos of current San Francisco openings.
Artist Help Network
Listing of online artist resources ranging from fiscal planning to legal issues to creativity.
Artist Resource
Great resource including calendars of shows, events and classes, readings, interactive forums, competitions, jobs, galleries, portfolios, hundreds of art links, art supplies, advice and techniques, and artists' stories.
Artists Meeting Place & Resource Collective
AMP connects artists and collaborators online by providing resources, opportunities, and personal connections.
http://pluginamp.com/
Center for Cultural Innovation
CCI promotes knowledge sharing, networking and financial independence for individual artists and creative entrepreneurs by providing business training, grants and loans, and incubating innovative projects that create new program knowledge, tools and practices for artists in the field.
http://www.cciarts.org/
College Art Association (CAA)
Comprehensive resource for artists including jobs listings, opportunities, career resources, and an annual conference.
http://www.collegeart.org/
New York Foundation for the Arts
Comprehensive resource for artists in every discipline with articles, information, event listings, career and funding opportunities, and more.