Also check out the rest of the site - they have a great links page. Online Guidelines is a site that has just about every place that accepts email submissions. SFWA or, Science Fiction Writers of America's site. This is a link to their writing tips site - everyone should read Myrtle the Manuscript. A great site overall, but these articles in particular are good.
Speculations is a great site to communicate with other writers.
Their Rumor Mill bulletin board is fun and i post there all the time. As i add more to my collection i'll add them here as well. I hope that you enjoyed my site, and once again, feel free to email me with any comments or suggestions.