I’ve been through a lot of different hand-held devices in the past 10 years. Most of them are absolute garbage. Some of them are pretty cool. But, none of them even come close to the iPod Touch. I use it for so many different purposes and could write a long paper on each of those. Big screen, easy to use web browser, massively populated app store... and Amazon Kindle support.
One of the primary purposes I use for iPod Touch for is for my Bible Study. Head over to http://www.netfxharmonics.com/document/iphone/bible to see my explanation (read: sales pitch) of how the iPod can aide anyone is in-depth Bible Study. Warning: the thing is very image heavy!