Here are some more explanations of the TAG argument, and addressing some of the common objections. Personally, I have somewhat of a difficult time defending as well as explaining the argument in light of the objections, which is why I haven't really spent too much time arguing these points publicly. However, the explanatory power of the presuppositional approach is still at the top of my list for defending the existence of God. If anyone knows of any serious, published responses to the TAG argument, i'd love to check them out.
Matt slick explains some more tenants of the TAG argument: