Imgur is a widely used feature rich image hosting site that would be worthy of integration in Gwenview. It's api allows people to:

Upload images anonymously
Upload images into accounts
Create and manage photo albums
Delete images
List all images in your account

http://api.imgur.com/

Image upload in Gwenview is handled by KIPI plugins. You should contact the KIPI developers for this kind of requests. You can reach them on their mailing-list: kde-imaging@kde.org.

Ok, I'll contact them.

EDIT:

I found the same feature request which is almost 2 years old at https://bugs.kde.org/show_bug.cgi?id=224893. The project seems dead since they haven't had a new release in a year or so as far as i can tell.

Edit #2:

They have newer releases on sourceforge.net than the one stated on their website download section.