I had a look at LinuxMCE the other day. I could not get it to install over Kubuntu using the CD method, using the DVD image did however work. LinuxMCE is interesting but I feel it tries to do to much. I'd really like to get the boot over network going but to do so I would have to redesign my home network and I just dont want to do that at the moment.
For the time being I'm putting linuxMCE on the back burner until I can find a use for it. Having said that its well worth checking out.