Love this app, and it's wonderfully to finally have it on the iPad. I think they did some really smart things with the UI, for instance, being able to adjust the space used for comments/description, the navigation at the top of the card, etc. They really put a lot of thought into it.
However, two things that bothered me as a heavy Trello user:
1) I could not figure out how to move a card from one board to another. Just does not seem to be possible (yet)?
2) The drop-down in the upper right corner of a card is where I expected the close button to be, as it is for the web app. I keep tapping it over and over, expecting the card to close, but instead it shows a drop-down menu with one option: "archive"! This feels like a big UI mistake to me.
Other than that, a fantastic first release. I can't wait to walk around the office tomorrow with my iPad, tending to projects, instead of always popping open my laptop!
Developer here. Thanks! Moving cards between boards is coming in a later release; it's not yet possible. As for closing the card, if you're in landscape mode you can tap the faded out background -- bit of a larger hit target. We'll be making it less annoying to close cards in portrait mode soon too.