Great thread! I agree with the Sticky idea... It will be easier to refer the inevitable cooling system questions here.
Another part I'd consider adding is the fan switch (13621433077, $20.97) and fan switch o-ring (13621743299, $1.32). These mount in the lower radiator hose and are a good idea to replace when replacing the hose as the old o-ring may not fit correctly in the new rad hose.