iPhone users now have an exclusive site to share their iPhone photos. It’s called Natuba. Natuba, headed by Richard Yoo of Rackspace, focuses on mobile uploading (it actually works with any phone capable of email). Users add their snapshots to the site simply by sending them to a specific email address. Photos can be captioned and titled and all are displayed in the public stream. Photos may also be rated and commented on. The homepage displays most viewed and recently discussed pictures, you can also choose to view photos randomly using the Surprise Me button. The Activity section shows you what’s going on Natuba, i.e. new comments and new photos uploaded. There’s a Facebook app and Twitter integration too.