Good Writing-Related Websites:
The Associated Writing Programs--contains resources for members of AWP, advice on career-building for writers, contests for writers everywhere, as well as books and ephemera for writers.
Glossary of Rhetorical Figures--
Inkspot--The Writer's Resource and Writing Newsletter
The National Endowment for the Arts--
New Writer's Magazine--Markets, Contests, Organizations, Book Reviews, etc.
Salon--Reviews, interviews, and multimedia about current books from one of the first Web-only general interest magazines.
Web del Sol--Web Del Sol cannot be classified as a literary publication or an Internet portal in the traditional sense (though it contains both subsets), but rather as a literary arts and new media complex which pushes the envelope of both definitions.
WD's list of top 25 Fiction Contests--contains what you need to know to enter, too.
Zuzu's Petals Literary Resourece--online literary magazine of poetry and lots of related links.