Mossberg says it doesnt have it...
"I also found iBooks, Apple's book reader and store, easy to use, and read a couple of books on it. I consider the larger color screen superior to the Kindle's, and encountered no eye strain. But the iPad is much heavier than the Kindle and most people will need two hands to use it. The iBooks app also lacks any way to enter notes, and Apple's catalog at launch will only be about 60,000 books versus more than 400,000 for Kindle."