Of interest in the last few weeks I noticed pretty much all of the books I scanned for PGDP have appeared in Apple's iBooks store. So far, of all of the major e-book booksellers I've tried, they seem to be the ones that implement the books in the best-formatted way.
Also, I have been putting off mentioning this for some years, so I'm sure someone else has mentioned this now. At http://georgewbush-whitehouse.archives.gov/kids/presidents/ulyssesgrant.html on the NARA archive of the 43rd president's website, President Grant is said to have been President Jackson's Secretary of War. That would have been quite an achievement, given he would have been between the ages of six and fourteen, and yet to enter West Point.
Of course what the students who wrote the quick biography meant was that he was Acting Secretary of War (give or take) for a similarly-surnamed President Johnson (they even shared the first name Andrew, adding to the confusion mix), but for some reason I found the minor (?) mildly amusing.
(Yes, it's a coincidence my previous entry was about the White House.)
Finally, my next entry I'm currently researching very slowly, but it's a list inspired by the Big Mac Index. I'm almost done with the raw data.