What if you go on vacation? I brought my Kindle on a week's vacation and read five books. It saved me a lot of weight when I was traveling.

I don't know why you'd want full-text search. Any particular reason you mention it? In any event, the Kindle doesn't offer it.

From the product page:

"Kindle makes it easy to search within a book, across your library, in the Kindle Store, or even the Web. To use the Search feature, simply type in a word or phrase you're looking for, and Kindle finds every instance in your book or across your Kindle library. Looking for the first reference of a character in your book? Simply type in the name and search. You can extend your search to the Kindle Store to find related titles you may be interested in. Explore even further by searching Wikipedia and the Web."