Hardware Boxing, 3 Comps, 5 Accounts. Anyone tried this?

[DarcJunglizm]

I was thinking of building 2 alt comps to run a double instance of keyclone on dual monitors and to link up to my main PC running a single, larger monitor. I won't need a webbrowsing machine/monitor because I already have a laptop that is perfectly capable(actually more than capable, its an XPS 1530). Yesterday when browsing around at possibilities of running a % box set up, i see the power consumption can be quite a nightmare. So I have previously picked out parts for 4 alt boxed costing just under $500 each on newegg but then I thought, what about running 2 dual SLi Dual Core comps with just the basics and using Keyclone in combination with hardware and Synerygy and a Main Computer to run 5 Instances of WoW. Has anyone tried this or can help me speculate on the possibilities of making it happen?

[BGuru]

I run 3 computers with 5 accounts. Center computer runs my main toon and each side computer runs 2 WoW alts.
I use Multiplicity and Keyclone everything seems to be working great.

[DarcJunglizm]

What kind of hardware do you use to hook your boxes together? KVM Switches or anything like this? Do you use Xkeys?