Yeah. I used the app KeyRing before passbook. You had to manually input your cards, but once you did they worked fine. Passource I imagine is the same way. I've added my Kroger card and Starbucks card. The Starbucks card worked fine, can't wait for the app to add pass support this weekend so it will pop up automatically.
I use the Keyring app, too and placing card information is almost effortless. I was hoping the Passbook app would be somewhat similar in regard to inputting data.
On this note I would add that card munch app is worth a try. I have been using it and do not need to carry all those membership cards which is awesome.
No, I'm not affiliated with "Card Munch"
...(snipped)...what I am curious about is how they will handle loyalty cards from supermarkets etc that may not have an iPhone app. Not sure why they couldn't set up a scan system for those.