Currently the NodeID is not a displayable column for the manage nodes page. I can pull this easily via swql custom reports but some folks might now be able to do this and would rather just use the web interface instead.
As a work around, if you were to copy the NodeIDs to a node custom property, you could display it then in Manage Nodes..
Easiest way to keep it up to date would be by SQL, I did look at the alerting "Change Custom Property", but couldn't find a way to pass the NodeID to it.
Thanks for the suggestion but that would be a lot of work and maintenance for us. We already have a ton of custom properties.