Guide for implementing my own table model?

Does documentation exist describing the steps necessary in order to implement my own table model? Or should I just read the code for AW.CSV.Table & AW.XML.Table?

Basically you just need an object with getData(col, row) and getCount() methods. If you want using XMLHttpRequest calls - you should subclass AW.HTTP.Request the same way as AW.CSV.Table or AW.XML.Table do.