This is exactly the functionality I was looking for. Thank you. Now I can allow users to upload their own files and view ONLY their files. All I have to do now is style it a bit since it looks kind of plain, although that could just be the Thesis theme stripping out the css as it does with forms and buttons.
One thing I did notice though, is when I upload a file, then hit refresh in my browser, it re-uploads the same file. (at least using Chrome 18.0.1025.152)