Excellent online workshops, by the publishers of Writer's Digest. WOW courses are available in several genres, and you have access to experienced tutors to help through the course.
Absolute Write has two newsletters to sign up to - and you will receive free listings of agents or job markets on signup. The site also sells ebooks, and software for writers, provides a writers directory, a large library of articles on writing, and a healthy writers forum called the Water Cooler. There are also classes / courses sold onsite which vary in content and duration.
A set of mailing lists (groups) which communicate via Email, open to all styles and genres of writing. There several critiquing and discussion lists to join and participate in.