Here’s my pick of the agent and writer sites that I’ve found helpful, though the list is dynamic in nature. Some I found on the Writer’s Digest 101 Best Writer Sites, which is updated yearly. Many of these sites listed below have been on the list for several years. Some of them offer postings about various aspects of the publishing process, and are maintained by a variety of literary agents, authors, editors and other writers. The information gained is comparative to the amount of time invested in reading and following the material found on these blogs or websites. There are also newsletters and email notification available which will keep you immersed in the daily events in the writing field.
In order of personal preference:
http://nathanbransford.blogspot.com/ Literary agent
http://jetreidliterary.blogspot.com/ Literary agent
http://accrispin.blogspot.com/ (Writers Beware Blog)
This short list will be updated with any new sites I learn about on an ongoing basis. Thanks to all those above who offer help or information to novice writers.
UPDATE-2011: Refer to revised list, 11 Writing Sites for 2011, as some of the above sites are no longer being maintained.