Originally Posted by
Skiz
iPhones and iTouchs can view PDF files natively. On the web, that is.
If you have PDF files from school, work, etc., you'll need to jailbreak your iTouch and install a free app called Cydia. Cydia is like the App Store, but for applications which were turned down by Apple. There are loads of great apps available there. With Cydia, you can download an app called "Docs". It essentially cordons of a folder where you can place files such as PDF, Word, Excel, ..... and view them directly on your device.
Going further, you can purchase a $20 app from the App Store called Quick Office which allows you to fully edit and create MS Office documents right on your device. Alternatively, you can download that for free if you have the know how.