Here are a few other sites you may find useful:

Actors' Grapevine - A great resource for auditions & shows around the Carolinas. Beloved by actors and theatre-goers alike.

Charlotte Theatre Magazine - A monthly look at the performing arts in the Charlotte area. Browse the website, then subscribe to the magazine.

The Arts Council of Rock Hill & York County - Theatrical and artistic goings-on in the area.

LibriVox - A great source for free audio books and plays. Webguy Ted has recorded a few things for them.