One.com is really cheap and it's pretty easy to set up a Drupal site. Some disadvantages are that it is only one database, and that max_execution_time is set quite low (30sec) so that admin/build/modules do not have time to finish, for example if you have admin_menu module and some other more demanding modules installed. Furthermore, the memory_limit is set to 24MB which can be too low if you have demanding modules.
$db_url = 'mysql://domain_xx:password@localhost/domain_xx';
$db_prefix = '';