No problem. The NRST/FairTax is a simple concept, but always seems to spark questions because people are so used to the system being convoluted and designed to shaft the taxpayer. It takes a while to adjust to simplicity. :)
I still prefer a truly flat tax - no, not a flat percentage of income, but a "everyone pays $X per year" one. That, far better than anything else, would actually shrink the size of government.