Working a little better for me. I did manage to check in using my iPhone last week. But I wasn't flying from a mobile boarding pass city so I could not test that option. I still wish I could view an entire itinerary, and not just the first leg of an itinerary under the manage reservations option (or whatever they call it).

I also noted that when I have put in my PIN, the iPhone now automatically displays a numeric keypad, and not the alpha keyboard which is nice since a PIN doesn't need letters.