After speeding up some things, it's time to attract a bigger audience. Drupalcron.org will provide the drupal admin with a cron visit every hour. No more cron configuration. Just create an account on Drupalcron.org and you can add 5 drupal sites to your user account.
If you administer more then 5 drupal sites, and yet you want central administration and still no cron configuration you can download and install the cron module. This allow you to add countless sites, to be visited when the cron of the on which the module is installed is executed. If you add that site to Drupalcron.org, all your sites crons will be executed every hour, without any configuration of cron.