(Constantly Updating)
http://thewritersguidetoepublishing.com/
http://www.indiesunlimited.com/
http://www.thepassivevoice.com
http://www.thecreativepenn.com/
The Ultimate Link for Writers
http://absolutewrite.com/forums/forumdisplay.php?s=&daysprune=&f=22 (Join and you can search hundreds of agents and publishers on the Discussion forum for experiences and news directly from other writers who have subbed/pubbed/or agented. Other forums to connect with readers, writers, etc. to get tips and find beta readers)
Blogs
http://cindimyersmarketnews.wordpress.com/ (Great publishing news)
http://www.forever-romance.com/community/bloggers/ (List of some of the most popular romance blogs)
Publishing/Marketing
http://thewritersguidetoepublishing.com/
http://www.indiesunlimited.com/
http://www.thepassivevoice.com
http://www.thecreativepenn.com/
Social Media
http://www.twuffer.com (schedule tweets in advance)
Sales Tracking
http://www.novelrank.com (free service to track your Amazon ranking all over the world and see who is tweeting and blogging about your book)
Author News
Review Sites