There are many photo storage services on the internet now. I personally have used
Webshots Pro but moved to
Flickr (pro) a few years ago when webshots rates went up but the service stayed the same, not to mention Flickr had what I thought was an easier interface. Regardless of which service you find to be the best, there will always be something missing and it appears Flickr is a little slow with what I would think would be a very important service and that is to find and remove duplicate photos.
Kudos to Hastarin. Flickr should seriously sign this guy up!