Use remote desktop only when you must talk to that box or VNC, that'll save the need for a KVM and work pretty damn well.
I have trouble with my digital KVM, the mac and linux boxes and screen resolution - it gets a bit funky. I do better with a VNC rig when I must talk to it.
Also, look into getting another monitor(s) for it then use something like Synergy (
http://synergy2.sourceforge.net/) to port keyboard and mouse across IP instead of physically - you'll drag your mouse to the edge of your Windows monitor and then it will show up on the Mac or other *nix boxes. I used that for quite a while and it was pretty cool.
it is a dually, right? Put 2 cheap monitors on the wall and let it show desktops of family photos until you need to use it.
Use it to process for you just as you would any other linux box. Raw processing will still rock for you.
Create an OpenCalDAV server and have sync'd calendars and addresses
Nice work BTW with the PMU replacement