[maxgaudin]

Personally I'm a big fan of Pinswift. I've tried several of these Pinboard apps and like it the most. http://pinswiftapp.com/

[rjsamson]

I haven't tried pinswift, but it looks cool. The main difference with Pinnin is that you can add bookmarks to pinboard directly from Safari or any app on your iPhone with a webview, in the same way you would add a bookmark to mobile safari.