Hello Melissa! I'll jump up on that bandwagon: we found early intervention to be AMAZING! A week after arriving home from China with my daughter -- even before we got the formal diagnosis that my daughter had profound hearing loss in both ears -- we had a wonderful SLP at our home using ASL with my daughter (and us). She soon added twice weekly parent-child sessions in an ASL-based group environment (with interpreters for newbies like me), along with 1X weekly info sessions for parents, moderated by a school psychologist who has worked many years with Deaf children and their families and frequented by educators, experienced parents of deaf kids, and deaf students willing to communicate their experiences. After two years of EI, that same wonderful SLP was hired by my daughter's deaf school at the same time my daughter turned 3 and began full-time preK in a class with other deaf kids with CIs -- and is her 3X weekly Communications instructor.
I have been learning ASL first through state provided Family Sign classes in my home, then through classes offered in the evening at my daughter's school, and I'm trying to get into an intensive program this summer (saving my pennies, bc it'll require a hefty tuition bill, but I think it will be worth it to move into really using the language at a level beyond that of my 5YO). Looking back, I wish I'd done immersion sooner.
to AllDeaf forum. I do hope you are talking to him in ASL as a primary sign language. It will make your son more understanding what you are saying than in oral language. If you continue to talk to him in oral, he will get frustrated not understanding why he has difficult time making ends tail of what you are speaking. So please use ASL. 
