I rented an iPad from the library for three days. I took it to see how it would do as a reading device for textbooks that I've been getting in electronic format (PDF). I must say I am cokmpletely impressed, not particularly with the iPad, which does a very good job (smooth system with good touch response), but with the idea of a tablet. It is an excellent device for those who enjoy reading articles online, texts that are not really convenient on a lighter ereader (nothing beats an e-ink reader for reading novels for example, but they do not cover PDFs well).
Anyway, I've been having some ankle problems and the idea to carry many texts with you on a light device is very attractive. Apparently, this could be a new trend for textbook formats as well, one that I would definitely embrace if I go to a professional school.
The iPad has a ten inch display; I am not willing to shell out 419$ on a tablet (iPad 2), so been looking at the Blackberry Playbook that sells for 200$ now. The screen size is seven inch, and I am not sue that is good enough for PDF reading. But I heard it lighter than the iPad (good for my arthritic body) and with good hardware, so will go check it out at the store possibly today.