The first is the blog WorthIt2BMe – Healing from Complex Trauma & PTSD. It has a really comprehensive overview of trauma theory, it’s effects, and useful links. It also has a great “outside” library of reputable trauma information sources.
The second is the APA’s overview of changes to PTSD diagnostic criteria in the DSM-V. It’s a .pdf, and written in relatively “plain english” to highlight the differences in diagnosing PTSD as of the release of the new DSM. While they have a lot of progress to make around understanding the effects fo trauma, this is a decent start.