Thanks, Neo...but as it turns out it WILL show up.

Actually, I figured it out quite by accident (this is one of those "Ain't I a dumbass" moments!)...Apparently, it may have had something to do with how I clustered my spline curve.

I've always clustered CV's one at a time using the "Deform>Create Cluster" command in the animation module. This time, I tried clustering the curve using the "Edit Curves>Selection>Cluster Curve" command in the modeling module (FYI that command clusters the entire curve at once). When I tried adding the node after that, it worked...go figure!

So I guess the lesson to be learned is that there is some sort of difference between clustering via the deform menu in animation and the edit curves menu in modeling!

If anyone knows WHY this is so, do please add your two cents! Maybe someone else will be spared the frustration!! :-)