Request for the ability to integrate with Flickr/Picasa. Creator can specify (optionally lock) an RSS Photo feed/credentials from these services. Optionally, User can change this address or be locked down by the screensaver Creator. Also, the User can set the frequency of updates, max drive space, etc.
NOTE: I have looked for >week at screensaver makers- few have this feature and the ones that do are terrible at the 'rest' of the features (like #transitions, options, etc.). It's almost 2009 and I cannot believe I cannot find (robust) screensaver software that supports online photo service APIs! ach! ex. Google Photos Screensaver totally rocks at this, but only has 4 transitions!
Another reason- the downloaded executable would be very small, as it doesn't have the images/video/flash embedded in it, it gets these from online.
Anyhoo, this would definitely set you apart...
PS. Yes, you can do this with Flash I know, but then you lock-out all of the User options.
C