While I respect the idea of Zooomr (especially since its the work of one 17 year old), I am left thinking that it suffers from Microsoft-itis.
For those who haven't seen it, Zooomr is described by Techcrunch as 'Flickr on Steroids.' It features maps, multiple sign-ins, zooms, etc. This is cool and all, but frankly the most important element of a photosharing site should be the photo. That is what makes Flickr so great--it highlights the user's photos, without throwing in additional (and only slightly necessary) functionality. The lesson for Zooomr is not to impress by adding lots and lots of features, but to do select things well.