Here are some links to Speech and Language sites and articles that I think are great resources for you and your child.
http://www.talkingchild.com/speechchart.html
Articulation milestones
http://www.asha.org/public/speech/disorders/LateBlooming.htm
Language development
http://www.asha.org/public/speech/development/language_speech.htm
What is Language? What is Speech?
Autism
Autism
http://www.autismteachingtools.com/page/bbbbtj/bbbbtc
Play skills
http://kidshealth.org/parent/medical/ears/central_auditory.html
Auditory Processing
http://www.nidcd.nih.gov/health/voice/auditory.asp
Auditory Processing
http://kidshealth.org/parent/medical/ears/central_auditory.html
Word Lists By Sounds
http://mommyspeechtherapy.com/?page_id=55