From the video of the keynote, it's not clear if in the new iBooks app you can highlight, annotate and bookmark also pdf files. Steve Jobs shows the new features only on Winnie The Pooh ebook, but just browses the pdf file without modifying it. Do you think that ibooks will allow the same functionality on both formats? Does anybody know if there is an app that allows to handwrite over a pdf? That would be a killer app for all people that have to read and annotate a lot of articles. That would be the main reason to buy an iPad for thousands, if not millions, of professionals.