Hi Soccermom - we are just finishing up year 6 of homeschooling so maybe I can offer some advice that might help.
First - don't panic - it's not that hard.  I think the hardest thing to do in the beginning is to figure out your kid.  What does he need to be able to learn.  Also - absolutely FORGET everything you ever thought school was suppossed to be prior to becoming your child's teacher.  All kids are different and require different things to be successful learners.
You need to do some curriculum searches - just type in keywords like homeschool science or homeschool math and see what comes up.  Then go to 
www.homeschoolreviews.com and see what others think of the curriculum you just found.  Go to the homeschool spot discussion forum and chat with these ladies - 
http://www.homeschoolspot.com/
they'll give you tons of ideas (even if you're not religous - I'm not and I go there all the time to chat and compare stuff).
There are a ton of places to buy curriculum - even on 
ebay - or you can make it up as you go along in some states.  There is even a subculture called "Unschool" where you have the child decide what and when to learn.  
Biggest tip for newbies - don't try to mimic regular schools - don't worry about grades (Why you ask - because if your kid doesn't get it you go over it until they do before moving on.  In my opinion - that makes it impossible to fail.) and don't worry too much about scheduling.  DON'T schedule more than a week or two in advance.  You really don't need that pressure!!  Slowing down and speeding up to accomodate your child is what homeschool is all about.
Ask a lot of questions and read everything you can find.  You'll find your style!
Also - with kids who have other needs interferring with school, I can't stress enough that there will be many times when school will take a back seat.  It is always OK to back off and re-group.  I do it all the time.  
Good luck and feel free to ask questions if you have them.
Julie