is it possible with mysql to automatically grant an user (which has CREATE privilege) ALL privileges exclusively on her new created databases ? (without manually changing rights after the db is created)
It's possible to grant privileges to any database which name is match some mask. Usually I do this for each new user:
GRANT ALL PRIVILEGES ON `userdbname\_%`.* TO `username`@localhost IDENTIFIED BY 'userpass';
After this command user will have all privileges to any database which name match "userdbname_SOMETHING". He also will be able to create any amount of databases at any time which name match this mask.