[jQuery] Form plugin: file upload question

Hi,
Question:
This new feature of form plugin file upload form Mike Alsup, is it
supposed to actually perform file uploads?
If yes isn't supposed to upload any file into server? When I look at my
php script I can't see any file uploads.
In other words I can't see any file being uploaded. I'll post an example
if needed, let me know.
Cheers,
--Kush