zip file support is a good solution for uploading multi images, however the max-upload-size will limit the size of the file and thusthe number of images.
Flash 8 now supports file upload. is there anyone now developping a flash which can upload multi files. Although I prefer using scp/ftp to upload files, It would be superb to have this implemented to zp, and it is only one click to upload a bunch of photos. It would be a final solution for uploading. There's some example flash code online demonstrating this feature.
I'm not a flash developer, and I don't even have a flash8 player under linux. I hope some one could do this. This project would be promising, since it can be wildly used for all kinds of applications and the server side code is extremely easy.