I have tried doing a search on foundation issues and ICF but haven't come up with to much.   I am looking for best practices regarding rebar,  slab thickness, moisture barriers, etc in regards to ICF.    Can anybody point me in the right direction?

If you have a favorite brand(s) of ICF, try reading their installation manual(s). You can also check out IRC manuals, which have a lot of info on ICF construction. As to footer design, your local conditions will dictate size, thickness, rebar schedule, etc., so check with local builders, codes people, etc.

The Prescriptive Method for Insulating Concrete Forms in Residential Construction might be of some help to you. 

The Prescriptive method, and IRC are all good. A good rule of thumb is one inch of concrete wall thickness per one foot of back-fill on the wall. Re bar will depend on a couple of things. When I install TF System it is so similar to a regular poured wall I use whatever the local poured walls guys use (per code). When I use block I will follow there recommendations in there manuals or there recommendations. The first thing I do especially in a area I am not familiar with is contact the inspector and ask, this makes life easy and gives you a happy inspector (always a plus). Moisture barrier I will use a damp proofer like Karnak or in most cases I will use Platon which is considered a waterproofer.