Parsing XML data feeds into database

We have a project that involves parsing XML files uploaded by FTP. The info in these files needs to be parsed according to a set of templates, and added to a MySQL database. Files are uploaded constantly throughout the day. There are approximately 12 different file formats. The second part of the project is creating an HTTP interface that our client application will use for retrieving information from the database, approximately 20 methods. This is a standard LAMP platform, and this project can use PHP or RoR, depending on the developer. Estimated schedule is 3 weeks, to begin immediately.