There are a lot of sites and personalities out there.. Really depends on what kind of information you are after and what types of running your are interested.
Runners World and Running Times both have a great variety, but there are also lots of individual bloggers that have great information.
I just launched a weekly newsletter for runners that attempts to pull out a few gems from the week. Content is tailored to your specific interest and abilities. It may open the door to other resources that you might not have otherwise known about. Feel free to check it out.