Add a web-based "screensaver" feature
I see there are some other screensaver feature requests already around. It would be really cool if you would create some integrations for Mac and Windows to easily use Lifecake as a screensaver, but:
Something easier for you I think would be to do a "web screensaver"; enter a fullscreen random timed display mode on the website. This would be kind of nice since I have multiple monitors at work; I could keep a maximized browser window open that would show me pictures, and when I need to use that screen I could just switch tabs or something.