Zooomr is a bit new (at least to me), but it’s really fun. Although many will most probably compare it to flickr, which is not a bad thing; similar user interface makes it easy to learn how to use the site. And there surely are some extra features such as signing in using your different web-services account namely Google, Meetro, LiveJournal, Level9, and OpenID. (Yes that’s a lot!).
Lightbox is a special display mode that can be activated by simply clicking on the LightBox emblem in the bottom left corner of all photos while searching
Also new to me is that the comment feature on their site supports Markdown, a text-to-HTML conversion tool for web writers. And have you heard of Zooomrtations? You can add audio annotations into each image, kinda like storytelling yes? Nice. But in my opinion, the coolest feature is that it speaks 13 languages! Now go fetch your families and friends! :D
Surely there are some more features you can check yourself here.
As for now, go give zooomr a shot; there’s no need to register :D