Not surprisingly, we're starting to see more and more early iPad 2 cases arriving in our offices for testing. The first folio we've seen so far is the Targus 360° Rotating Stand & Case ($60), which at first appears to be a traditional folio with a padded leather front cover and strap to keep it shut. What's somewhat unique is the inner plastic holder: the iPad 2 snaps into place, and can be rotated into either portrait or landscape orientation before…