One of the coolest features of the iPhone is using it as a wireless USB drive. The iPhone can be used to carry all of your documents around so that you can use them on any convenient computer. One advantage over a thumbdrive is that you can not only transport these files from cvomputer-to-computer but you can view the files, right on the iPhone, as well.
In order to do this you must use a third party application. I will demonstrate the application that I use, DataCase (6.99 from the iTunes Store).
1. Start the application by tapping on it.
3. To see the files on a PC or Mac, type in either the http or ftp address in the address bar of a internet browser or FTP client. The iPhone and the computer must be logged on to the same wireless network for this to work (I think).
Here are the instructional How-To videos from DataCase’s website.
MacOS X Leopard walkthrough: