Based on their great Mag+ concept unveiled late last year, Bonnier and BERG have developed a really nice looking iPad version of Popular Science. No page-turning business...you swipe left/right to page through stories and then scroll to read through single stories.
Mag+ live with Popular Science+ from Bonnier on Vimeo.
What amazes me is that you don't feel like you're using a website, or even that you're using an e-reader on a new tablet device -- which, technically, is what it is. It feels like you're reading a magazine.