@ Jeriho: Sort of off topic, but just in case you are not aware of this....I have never read any PDFs on my Kindle, but many others here have commented that the Kindle 3 screen is too small to do justice to them. They advise getting the DXG version for the reading of text books and PDFs. (You don't specify which model you are looking at, so please ignore this if you were researching the DXG, not the Kindle 3.)
Here's an article with about the Kindle 3 and PDFs, which relates some positives and some negatives:
http://www.the-ebook-reader.com/kind...df-review.html
Holly