I was thinking more about creating a separate application dedicated to using images from the phone only. Though I wan’t probably have time for anything in the end – totally busy with the Qt-related startup I joined lately.
Do you mean just rotating the local images (from some collection, or a set of favorite ones), or mixing ones from flickr with the local ones as in http://dailywallpaper.uservoice.com/forums/135625-general/suggestions/2361025-combine-pictures-coming-from-flickr-with-the-local ?
Not sure if I can find a way for noticing the fact of unlock, but I’ll try researching this topic
Indeed, that could save some battery life. I'll think how to do something like that. I guess in most of cases we are not that interested in getting exactly the latest pictures - more in getting not-yet-seen pictures.
I will definitely do something in line of this. The challenge is coming up with a good UI for it. User has to see in advance how much crap is in the flickr searches by default :)
Or maybe there is a way to filter out too bad photos somehow.