For those who are living in Indonesia and wanted to download the latest Ubuntu/Kubuntu 12.04 releases, you can find the ISOs on our ISO Server at UKDW: http://iso.ukdw.ac.id.
We provided CD/DVD ISOs for 32/64 bit architecture and for amd64 and i386 processors only. We skipped the PowerPC because almost none of us use that machine in our campus. We also skipped Mac version, so it's pure Intel and AMD processors only.
We also host Ubuntu repository which can be seen at http://repo.ukdw.ac.id. It's updated regularly, so you can use it if you are living in Indonesia.