From: Rodrigo Barbosa rodrigob@suespammers.org
Btw, don't quote me on this one :) I'm only 90% sure of the hotswapping capabilities, and less than 50% sure about the price :)
There _are_ systems with hot-swap CPUs, memory and/or, PCI[-X] slots. They are _not_ commodity and pricey, and require OS-level support.
In fact, I believe Linux 2.6 has some support for hot-swap -- at least at the PCI[-X] level, if not memory and possibly CPU as well. It requires extensive support though for that type of "dynamic" flexibility.
-- Bryan J. Smith mailto:b.j.smith@ieee.org