There is an excellent blog out of the UK called QuestioningAnswers that tracks biological research in autism around the world. Paul Whiteley, the blog's author is a researcher himself as well as a competent writer. He provides the context of the articles he reviews as well as pointers to similar papers. If you like to go deep and see what's out there, this is for you.
In that same light, the Interagency Autism Coordination Committee (IACC) published a review of advances in autism research this past year. Paul Whitely reviewed the review this past week (April 9, 2013) and added to it. Check it out.
1. IACC Website: http://iacc.hhs.gov/summary-advances/2012/index.shtml#citation-list-selected-articles
2. QuestioningAnswers blog:http://questioning-answers.blogspot.com/