Use a CGI form to upload images to managed directories on your server. You can set a maximum image size for the folder, and images will be automatically shrunk to fit. The registered version allows multiple directories to be managed.
Ever wanted a technology solution to allow you to view high res images from a server in thumbnail size or in smaller size and then have the ability to zoom in closer to see more detail? Now you can and its free with source for all to use. All ability is in the server, so no need for client side modifications, all you need is this cgi that uses libjpeg and thats it.