I have been watching the eBook Reader saga since the RocketBook days (late 90's). I have friends who love their Kindles/iPod Touch, etc., and couldn't live without them. I have friends who received them as gifts and haven't become fans yet.
Both the Kindle and the Sony eReader have popped up on sale, refurbished, for around $100. (They sell out fast.) The question is not whether you will ever own an eBook reader, but when. If you feel ready to make the plunge now, Wiley, a publishing house, has a handy comparison tool to help you select the right one for your needs. Find it here.