Using two sun blade 1000s.

I have two sunblade 1000's. One has two CPUs and the other one.
What I'd like to do is use both by connecting one to the other through a
NIC.
1) Is there a howto for doing such with the sunblade?
2) What NIC- 10/100/1000 would I need?

I think this is somewhat similar to clustering but am not sure.

Why do I want to do this?
1.) I only have one monitor between both boxes.
2.) I want to use both boxes simultaneously.