Fast and Furious way to revealing the revelations
One of the oddest thing in Nuke is the lack of a way to reveal the directory of a read/write node in Windows Explorer (or the OS native file browser like Mac OSX Finder).
All credit goes to Saurabh Sameer for the script!
u = os.path.normpath(u)
cmd = 'explorer "%s"' % (u)
Copy the above code into menu.py (located in the plugins folder) and use the Tab function in the node graph to call out RevealInExplorer to execute it at the read/write node of your choice.
You can refer to the header image if you need reference on where to put the script in the menu.py. I put it right before the # Menu definitions since it is situated at the top of the menu.py script.