Every couple of weeks it seems yet another iPad news reader is released in the App Store. Many of them leverage your connections in Facebook and Twitter but only one of them learns what you read and serves up more related content to match those interests. I'm talking about Zite, of course. It's been my favorite iPad app since the day I downloaded it. I've tried others but I keep coming back to Zite. This TOC podcast features an interview with Zite CEO Mark Johnson. He talks about the recent CNN acquisition, what makes Zite special and how the platform might eventually be extended into book-length content.