I just came across a really good article by PCMag with the dateline of 24 May 2011 that explains the functionality of B&N's updated NOOK original. For anyone who is considering the purchase of an ereader right now, I recommend reading this article.
PCMag.com explains the force behind B&N's updated eInk reader...
If you are just beginning to explore ereaders I also urge you to borrow some or spend some time shopping for them and actually using them in-store. If you have any friends who own ereaders consider spending an hour or two with them and using one in person. Try to give yourself the chance to compare a couple of models by using them for a few minutes. Find out what it takes to perform a download. Find out how to highlight or bookmark or make notes about a passage and how to find those notes again. Ask other users what things they really appreciate about their ereader. Then ask them if there are functions that it doesn't have or doesn't perform well.
Prices continue to come down but with such a purchase you want to try to assure that you'll be as happy as possible.
Note that some libraries now also loan ereaders for up to two weeks so that new users can become accustomed to them and find which model best suits them. Our library offers the original NOK and Kobo ereaders I think.