Mountbatten (with the help of Datanet) is running an Ubuntu and Debian caching server. The caching server holds all previously downloaded updates for Ubununt, Kubuntu, Xubuntu and Debian.
Using the cache to download your updates will greatly increase the speed with which you are keeping your Ubuntu installation uptodate (if your ISP is doing a proper job).
The way to get this working is very very simple.
As root open the file /etc/apt/sources.list and replace all instances of ug.archive.ubuntu.com with ubuntu.mountbatten.net. (Off course you want to make a copy of that file first!)
To open a text file as sudo in Kubuntu, from the command prompt type:
sudo kate /etc/apt/sources.list
That will open Kate with write rights to the file. Using CTRL + R you can now search & replace the servernames. End with saving the file.
then, update your system by typing:
sudo apt-get update && sudo apt-get upgrade
This will update your software to the latest version within the release you are running.
Remember, its a cache, not a full blown repository. If you install something that is not downloaded yet, you will have to wait a bit longer.
If you run multiple Ubuntu machines in your network, you should definitly consider running a cache yourself.
Disclaimer: This is just a free service, provided by Mountbatten with lots and lots of love from Datanet as well.
IMPORTANT: If you are on a VSAT link or not in Uganda, dont even think of using this service. You already have the fastest possible connection to the Ubuntu repositories, this service is not going to help.