Below are links to some great sites:
ShowChoir Community
http://www.showchoir.com
The Attache' ShowChoir of Clinton High School, Clinton MS
http://www.attache.org
The Elite Energy ShowChoir of Eisenhower High School, Decatur, IL
http://www.dps61.org/eee/
The Powerhouse ShowChoir of John Burroughs Powerhouse, Burbank CA
http://www.jbhsvma.com