I live in Prince William County, VA. Our property assessment value was increased 40% for 2004. If this rate keeps up, we will be selling our house in one or two years due to the difference in purchase/sale price getting taxed (more than 500k profit). We really like our home but hate taxes more.
Sounds like you need a Cali prop.13.
As long as your property value is going up every year at many times the cost of your property tax bill, this would be a very poor financial decision, IMHO.