I would love to see IPTC support. Why? Because I use the IPTC fields to fill in the title of the pictures and a description before I upload. So it is a total waste of time and energy to do it again. Of course, you need to be abel to change it if you would like to do that.

As far as I know, IPTC is different from EXIF. EXIF is the data that is registered in the camera. IPTC is the rest that you can fill in later. Keywords, categories, title, caption, photographer, geographic location etc.

On the picture page, I only want to display the title of the picture and the caption, both from IPTC. But hidden, using AJAX, maybe, I would like to have exposure data, keywords, categories etc.

I'll add my support for this feature. It would be very useful to have title and description filled in from the IPTC automatically on upload.

I just posted some code to read and display IPTC title and caption on the image page:
Trac ticket #100

It gets the info in real time from the image, and doesn't store it in the database, but it's a start.