I don't how relevant this is, but as I use the Trello app on my phone to update my own to-do list, it opened up your Trello in the app as well (I'm reading this on my phone). Hover features won't work on mobile (which isn't a huge issue but it is something to keep in mind) as well as the title cards not all displaying right.
http://i.cubeupload.com/ggFueq.jpg
Not an earth-shattering issue by any means, but it's definitely something to keep in mind!
Other than that, the way you've got things organized works quite well. I like it!

https://trello.com/b/E1hg8rU9/wolfb.....owed-art-queue
Here's my Trello, just cause.

You wouldn't happen to know what the ideal image's dimensions are for the app would you?

I don't have them exactly, but with some rough eyeballing, it seems to have come out to be 330 x 200.
(I did this by downloading the image Jing used, looking at how the "Info" image was displayed in the app, and then cropping it down with a visual estimate and getting the measurements that way.)
I would assume that as long as you keep your words/image/pattern/etc within that measurement, it should theoretically stay within the boundaries and appear normally! I'm not sure if the sizes fluctuate depending on the phone or not.
Best way to be sure is to test it out, but hopefully this is a step in the right direction. Let me know if it works/doesn't work/etc!

Ah alrighty thank you! >v</