Dr Harris addressed this on his forum before getting pissed at forums and closing it down.
Basically, whenever he says "Rice Krispies", he's talking about some sort of generic "toasted rice". It may contain some amount of added sugar, but in the grand scheme of things it's not that significant (sweet potatoes contain sucrose too). His goal was to up his starch intake to help deal with a period of additional physical activity and probably had something to do with his changing views on ketosis.
From his perspective, "processing" is largely irrelevant, since "processing" includes such things as cooking, cutting or doing virtually anything other than killing and immediately eating something. Toasting some rice to make it crisp isn't any more a big deal than cooking a steak or boiling vegetables.
So whatever he's eating, it's not very sugary, its processing is minimal/irrelevant, and Harris has always been a milk-neutral sort of person (drink it if you tolerate it, don't if you don't).
PaNu is "Paleo". It's what Paleo should be, at least: use ideas about the past to generate hypotheses and then test them using modern science. If Paleo means stopping short of the test, then no, Panu isn't Paleo. If Paleo can handle getting tested, you'd get PaNu.