Well, you may be a bit less happy to find out that the CCK doesn't support thumb drives. The problem lies in two areas. First, the CCK does not allow for the power requirements of thumb drives. (There may be a few exceptions to this rule, but it's generally true.) But more importantly, the iPad does not support a "common file system." In other words, you cannot "mount" a usb thumb drive as a storage device as you can on a PC. Rather, on the iPad a particular app is "walled off" from all other apps. It maintains its own data including any documents associated with it in the iPad's own storage and has no way to access the data on a thumb drive.
This may seem insane to you. It does to many people used to working with a personal computer. It means, for example, that if you have two applications that need access to the same document, there are two copies of the document maintained on the iPad. If you make a change with one app, it won't be reflected in the document maintained by the other app. On the other hand, it is an approach that serves very well to prevent "foreign" documents (that might contain viruses or malware) from getting "loose" in the iPad's OS and infecting the entire system.
There is, of course, a way around this problem if your usb holds music or video data. That requires importing the material into iTunes and synchronizing your iPad.
