Good idea that doesn't fulfill its' promise
This app creates a to do list, then takes a picture of the image and saves it to your photo roll. Then, you go to your settings and set it as your wallpaper. It is a static image, not changeable once it is complete.
You could do this yourself in any other to do list or notes app by writing your list, then taking its picture and setting it as your wallpaper. The only advantage is that Do5 has a "shortcut" button to "save" the image, which places it in your photo roll.
I thought that the app itself was the wallpaper, and could be used from the wallpaper screen, so I was disappointed. My To Do is constantly evolving and I would love to have it always visible and easily modifiable. I hope the developer will incorporate this idea into future versions.