> One question, it specifically mentions using the WebKit framework, does that mean that this is not allowed under the old UIWebView class?

This is nothing new. We have been using UIWebView to download JS code in our App Store apps since iOS 3. You can use UIWebView or WKWebView. I don't understand why this is on the front page of HN except that someone over at Meteor is doing a good job at drawing attention to their framework.

edit: I do understand that App Store rules can be confusing and Meteor may need to have this PSA to ensure their developers feel comfortable using their framework. But ultimately it's still nothing new, not news, and probably doesn't belong the HN front page – I'm sure I wasn't the only one who clicked the link thinking it was for native apps only to be disappointed.