Hello,
there is two features which are so useful and many customer will need it.
1- make website that members able to put their stuff for sale, i believe it called ad classified website.
2- the other option which also will be used in the first feature is user input upload file one which is available now but it allows you to upload only one image or file at one shot, it will great and very useful to allow the user to upload multiple files at one shot.
regards