Submitting a page, picture, video, ...

By redirecting a user to the following address you can make adding a new link more conventient. 
http://passingpix.com/add?uri=<URI>;lnk=<URI>;msg=<UTF-8>

All parameters need to be URL-encoded, of course.

Generate submission button

Absolute URI of the picture or video to be submitted. This is the source for the thumbnail.

Optional. If you want the thumbnail to be linked with a webpage, enter its absolute URI. lnk is ignored for videos.

Optional. Can be used to preset the comment field.

Code
Example

To preview what users will see when they click on the button, just, well, click on the button above.