To me, Dumpr sounds like you are throwing stuff away, being destructive, but this site allows you to add value and be creative. Essentially, you give it a picture and the site manipulates it in interesting ways. For example, how about a Rubik's Dog:
Or, pictures at an exhibition:
There are twenty-one different effects you can apply and you can upload photos from your hard disk, or pull them in from facebook, Picasa, Flickr or a Web URL.
So what are you waiting for, go and have some fun with photos... And if you do, remember to share your creations by posting a link to them here.