Did you know that the top five states in LDS Church membership growth between 2000 and 2008 (including convert baptisms and members moving in) were Tennessee, West Virginia, Kentucky, Iowa, and South Carolina in that order? This and similar factoids are plentifully available on Matt Martinich's blog United States and Canada Church Growth. Also see his other blog LDS Church Growth for commentary and news on Church growth worldwide.
Martinich is mesmerized with Church statistics and he provides detailed analyses of where the Church is growing and, in a few cases, shrinking. His thoughtful posts include maps, history, and comparison of current statistics with growth during previous eras.