On 1. november 2007 I managed to put our Stratum-1 NTP server online using two ISP providers.
Now our server is reachable using folowing two addresses:
ntp1.mostovna.com (same as ntp.mostovna.com) on provider T-2.net
ntp2.mostovna.com on provider SiOL.net
You can now try and test which provider gives you lower roundtrip delay.
Let’s go synchin’ 
You can use ntp.mostovna.com on almost every OS. If you are using open source OS like for example Ubuntu you can set your NTP time source in your graphical interface where you set time and date. Almost the same is for Windows XP and Windows Vista.
If you want more “advanced” maybe a client that gives you some more information I suggest to check SP Time Sync. It runs on Windows and also on PocketPCs or Smartphones that use Windows mobile system.
For more advanced users / system administrators … Microsoft published some interesting sites about setting time source on domain controllers, clients … Check the folowing KBs:
This server is located in Nova Gorica in Multimedial center Mostovna. We are running this server for slovenian internet community and accademic community in other exYu countries.
Stratum-1 NTP server is most accurate time source that you can get on the internet. Our is synching with GPS reciever.
Here you can check the picture of Windows monitoring software…
…on which you can see the exact position of the GPS module, and the time, that is module getting from the satelites.