First a good source from Allen Tate:
Allen Tate Company Answers Questions about Revaluation
And second a good article from this morning's Observer.
County gets OK to expand revaluation appeals board - CharlotteObserver.com (http://www.charlotteobserver.com/2011/02/25/2089873/county-gets-ok-to-expand-revaluation.html - broken link)