Small update to include the X-Keys products and add links for the tools I've mentioned.

I'm afraid I don't really intend to extend this experiment beyond what I've done here. I will, one day, run two instances of WoW on each machine for a 10 man setup, but I really don't see me ever wanting to run more than that.

Indeed, I'd rather stick with the one-instance-per-machine model that I currently have, but I'm living away from home in a small (100sq m!) apartment until at least the end of this year, so space is at a premium!!