amanoffewwords,
You might also be interested in the following:
Cybernet zero footprint PC
The PC is integrated into the keyboard, saving deskspace.
Heating is overcome just as with laptops - chips optimised for low power consumption.
Upgrades of memory and hard disk are straightforward, I believe, but that's about it, although there is also limited expansion space for a PCI card. I'm suprised there's no PC Card slot, though.
However, with so many items built in, including optical drive, floppy drive, NIC, firewire and USB, it's hard to see what you would want to add. OK, it's not aimed at the gaming or high-end workstation users, but it looks pretty neat for what it is.
And you're not constrained in your choice of monitor.
SD