We use ntp.ubuntu.com (but I doubt it is atomic)
From: School Information Technology Discussion
[mailto:[log in to unmask]] On Behalf Of Steve Cavrak
Sent: Friday, February 17, 2012 12:19 PM
To: [log in to unmask]
Subject: Re: atomic wall clocks
Unless you are running neutrino time of flight experiments, ...
http://tf.nist.gov/tf-cgi/servers.cgi ... might be easier to maintain ...
what with the up and coming (or not) leap second adjustment ...
(And people will still be late for meetings ... :)