Automated data upload for customers

I have a system where I'm trying to facilitate a process for customers to upload data to me (basically a list of people), and have it go into a database. I can give them certain parameters, like it has to be a CSV file, delimited in such a way, etc. but can't ask much more of them than that, since people are largely stupid. :) And then there would be the usual multipart form upload where they select their file and send it up. I'd need to import it into MySQL. Before I sit down and start coding this thing from scratch, does anyone know if there is something similar out there already that could give me a head start? - Brian