This isn't exactly a software release as it's built into your iLiad. Doesn't look like anyone knows about it though...
It's possible to watch a photo slideshow on your iLiad. Right now, you'll have to manually edit the manifest.xml to add/remove other pictures, but this should give you a good start. Who knows, maybe I'll decide to fire up Visual Basic and make an easy windows application that generates the necessary files.
I've attached an example slideshow that uses screenshots from my Iliad (it might be a bit confusing...). You can edit the manifest.xml to change pictures and add news one's if you like. It should work with any file format that the notes application can view (png, jpg, gif, etc).
Oh, and you shouldn't even need shell access for this to work.