Have a loading bar, when uploading images.

Thanks for the suggestion. This is possible in PHP, but requires specific extensions/software on the server to work (namely, perl, or PHP5 compiled with support for upload file detail, which is rare).

A better solution would be a Flash or Java based client-side upload widget. This would be very cool.

Feel free to file it as a feature request on Trac, http://www.zenphoto.org/trac/newticket