Try cz.pool.ntp.org or check out the lists at
http://www.ntp.orgNTP servers all give out UTC time, so provided everything is configured correctly for your location, it shouldn't matter which server you use - although a local one is better.
I don't know whether you saw it in the other thread, but the crashing problem with Facts is not due to the TCP/IP stack being inactive, but a bug in Installer which (non-visibly) corrupts one of the tooltypes when it updates it. If you blank them all out and restart/reconfigure Facts the crash should no longer occur.
Chris