A normal Flickr RSS feed will give you only the 20 most recent pictures (and only in thumb or original format) while we needed all the pictures of a whole week. Thanks to a sample on Yahoo Pipes I could create a feed with an unlimited amount of pictures and with the format of 500×500 (sufficient resolution for our demands. Unfortunately Yahoo Pipes isn’t very stable, so in the end we used a downloaded (not realtime) version of the RSS feed as a backup.
Download the composition: Flickr Polaroid stream
The code is pretty well documented, the graphic design of the polaroids needs some improvement. Let my know in the comments if you used this composition or made an alternation on it.