Kubuntu/Ubuntu needs a [better] Remote Desktop feature

Tristan Rhodes has written a blog post called "Ubuntu needs a secure remote desktop". I totally agree. It is already possible, but it is not easy or good enough. Kubuntu/Ubuntu needs something similar to what Windows have. My father isn't exactly a computer geek so I sometimes have to help him with something. Remote Desktop makes it much easier to help him. He requests my assistance and I am able to take over his desktop and show him how to solve his problem. I don't know what the best solution is, maybe FreeNX based?