An Amazon Gift Certificate is always welcome, and can be sent to anyone via email or snail mail, anywhere on the planet.
Now you can even purchase Kindle books (gift a book) for anyone with an email address. No Kindle is necessary. They will certainly want one, but Amazon has FREE Kindle software for their Windows or Mac PC, iPhone/iTouch, Android and Blackberry. I am so glad Amazon got this going a few weeks ago!
Any Amazon Kindle book can be given as a gift, but if your friend doesn't like or already has read the book, it can be exchanged for an Amazon gift certificate. Either way, shopping is a breeze, and your friend will be sure to have something he/she wants. Personally, I would lean more toward a gift certificate, but I do have a few close friends who would appreciate a great read.
If you have your Kindle in your hand, do a search in the Amazon Store for Wordoku. I received an email from the folks who made this nifty game yesterday letting me know it was available in the Kindle store. I did a little checking and read a little more about it and thought the price was fair, so I purchased it. It is going to be a real brain exerciser, that's for sure! I got that and a Mahjong matching tiles game (similar to one I am addicted to on the computer) for less than $10. Can't beat that for some long term fun!
Let's face it, you can't read all the time, but chances are your Kindle is always close.