Bart, this is not a poor man's ntp. This is a stupid man's Unix management :)
Do you plan on running that script from cron each day ? Or do you plan on eventually configuring ntp for the boxen ?
Your poor man's configuration management solution would be to use a tool such as dssh or Cluster SSH
However what you really want to do is look into a tool like Puppet and instruct puppet to "Configure NTP on host X-Y-Z"
There's a great article from chromatic about Puppet and Luke over at O'Reilly, you might want to check it out .