And here is a link from Nate Hoffelder (MR mod "Nate the Great"?):
http://www.the-digital-reader.com/20...be-jailbroken/
But like so many other sites, he linked directly to the "5.1.x" jailbreak post, which until a few hours ago could be a bit confusing regarding the Paperwhite. All is well now, after the thread was renamed to include "5.2.0" and "Paperwhite".
It would have been less confusing for newcomers to MobileRead if all those posts had linked to this thread instead, to instruct people in how to use the jailbreak at the other thread. But that is no longer a problem.