Leo says there isn't a file system on the iPad, which is a common complaint. All files stored on the iPad are owned by an application. So in order to get a document onto the iPad, he must sync it to the application through iTunes, or download it from something like DropBox.
He also wants to be able to upload photos and videos. Leo says that he can buy the Apple Camera Connection Kit that will read SD cards and import photos to the iPhoto app.