It appears that the Photo Channel can use image data, but what exactly can it do? Also, which format of image data can be used?
It goes without saying that the channel can display image data on your TV screen, but you can also draw text and pictures over the top of these images and have fun with slideshows that continuously change the pictures while playing background music. In addition, in version 1.1, it became possible to customise the screen by pasting image data onto the Photo Channel's icon on the Wii Menu screen.
The formats that can be used are: (1) image data in JPEG format whose size is up to 8192x8192 and (2) image data from the Wii Message Board.