As you probably know, the Kindle Paperwhite is Amazon's second touchscreen equipped ereader. This detail is important because it turns out that Amazon took an important shortcut in designing the KPW. Basically they took the existing design and modified it rather than designing it from scratch.
I had already suspected as much from the early reports that the KPW was running the Kindle OS 5.2 firmware. The Kindle Touch is still running 5.1, and that by itself was a good sign that the same hacks might work.
And at least one of the hacks does work. You can find it over at MobileRead. While all the instructions say Kindle Touch, this is the one I used to jailbreak my Kindle Paperwhite.
If you decide to do this, be sure to use the correct file. Otherwise it won't work. The file you need to use is called "data.stgz". There is another file with a similar name and it is very easy to get them confused.