warning the user/local/mysql/data directory is not owned by the mysql user
If you can't start mysql service in snow leopard, and in the panel prefs appears 'warning the user/local/mysql/data directory is not owned by the mysql user', you have to:

 - sudo chown -RL root:mysql /usr/local/mysql
 - sudo chown -RL mysql:mysql /usr/local/mysql/data
 - sudo /usr/local/mysql/support-files/mysql.server start


It works for me!
warning the user/local/mysql/data directory is not owned by the mysql user
===

If you can't start mysql service in snow leopard, and in the panel prefs appears 'warning the user/local/mysql/data directory is not owned by the mysql user', you have to:

 - sudo chown -RL root:mysql /usr/local/mysql
 - sudo chown -RL mysql:mysql /usr/local/mysql/data
 - sudo /usr/local/mysql/support-files/mysql.server start


It works for me!