Natuba is aiming to be the Flickr for the iPhone crowd.
Sign up for your free account and you’ll get an email address that links your phone to your Natuba account. Take a photo, email it to Natuba and it will appear.
Like Flickr comments are welcome on your photos and you can visit other users photos. You can follow someone or be followed, tag favorites and use it much the same way you do your Flickr account.