I dont think I have ever been on top of you (lmao). Yes, for occasional reading of a text, a .pdf is very nice, but when it comes to studying, doing problem sets, or looking for info (as you point out), a .pdf really is an inferior format. On the other hand, it sure is awfully easy to carry around 2000 books in .pdf format, while 5 or 6 regular books can be a terrible physical burden... far more than the weight of an eDGe, or even a Kno (if it was a real device). Everything is a trade-off.