Their small, portable, cute, and probably taste like chicken!
UltraVNC single click. Its a reverse VNC, designed for this purpose. They double click the executable, and then automatically connects to your listening client.
Its customizable so you can make it look professional if needed. They only have to run the file, it does everything else.
Not worth it. They would be too big to fit inside standard cases, you wouldn't be able to power accessories (eg: external harddrive, other stuff that shouldn't be turned off)
Also, UPSs are pretty efficient, there isn't too much extra loss converting to AC and back. There is no need for this.
From TFA: "Ubuntu 8.10 Desktop Edition easily ranks higher than any other Linux desktop OS we've looked at"
I have a strong feeling they've never tried DSL, Debian, Gentoo, Slackware, etc... After looking through the first 5 pages of search results for "Linux", the only other distribution than Ubuntu was Linpus. I think Ubuntu is great, but if your looking for performance, there are better alternatives out there.