If you're curious about e-books but don't want to shell out for a dedicated e-book reader until you're sure you'd use one, you can pick up an e-book reader application for free online. It might not offer the benefit of being 'easy' on the eyes that e-book readers like the Kindle claim, but it gives you a no-cost opportunity to sample the e-book experience.
I've got two, greedy girl that I am. I started off with the Kindle for PC application, then found out about Adobe Digital Editions. (I got it to check e-book formatting for Smashwords when I published my short story collection.) Anyway, while I decide if I need a Kindle or some similar device, this keeps me in e-books.
Mind you, should you decide to get yourself a free e-book reader application so you can have a look and see what all the fuss is about, you will quickly find that you now have access to a bunch of free e-books, too. That's right - one free thing leads to another. My Kindle for PC malarkey actually had some books available when I downloaded it: Aesop's Fables, Treasure Island, and Pride and Prejudice. They may well not be to your taste (I hate Jane Austen) but it means you can see how it works, and then start looking around to see what other goodies are out there.
Can't be bad!