These guys know a whole lot more than I do about networking so I'll just tell you what I'd do based on their fine advice.
As Russ said
<<Why not just let the router assign the IP address with DHCP? Much simpler.>>
Do what Russ said.
SetiQ itself doesn't require
any ip info for the other machines trying to connect to it on the network. To get the other computers on the network to connect to the setiQ server all you have to do is set the proxy settings for each of the clients to point to the setiQ server.
Office boy stated
<<Just use computer name, as in "-proxy computername:5512". That will work fine.>>
As he said you don't even have to know the ip of the machine running setiQ just the name of the computer.
Networkman stated
<<I run SetiQ on each PC(the logic being that if a single PC were to fail, my luck would determine it the be the single queue server).>>
That was my luck. It was always my setiQ server.

This is a fine solution. Personally instead of running multiple copies of setiQ I run one setiQ server with a weeks worth of wu's and a copy of SetiDriver on each of my machines pointing to the setiQ server. That way I can keep a days worth of wu's on each pc in case of a setiQ server crash.