Free Linux desktop accessible using NX client

I just came across a CosmoPOD which is a free online desktop. It is a Linux system, running NoMachine NX Server, with KDE desktops (appears to be using kiosk mode which restricts what you can do, and it looks like no shell access). You have to download the NX client to remote access it. This is a great way to try out Linux, KDE, and apps like OpenOffice 2.0. It is also a good demo of NX, which is very fast.