Uninstalling MySQL Community Server on OS X Raw

Tested on 10.7 (Lion) and 10.6 (Snow Leopard).

Remove all startup items, receipts and the MySQL installation directory:

    sudo rm -rf /Library/StartupItems/MySQL*  
    sudo rm -rf /Library/PreferencePanes/MySQL*  
    sudo rm -rf /Library/Receipts/mysql-*  
    sudo rm -rf /var/db/receipts/com.mysql.*  
    sudo rm /usr/local/mysql  
    sudo rm -rf /usr/local/mysql-*

Remove this in `/etc/hostconfig`

    MYSQLCOM=-NO-

Done.