As a side project I am working on an entry for the 10K Apart competition which is due quite soon so I will not talk about it much yet since I still have work to do.
Start at http://jigsaw.alleged.org.uk/, enter a Flickr tag and
If you like, you can enter an image URL of your own. Animated GIFs will work on some browsers, which is moderately amusing.
If you want to gaze upon the un-minimized code, it is available on GitHub.
Update (23:30): You now switch between entering Flickr tags or specifying the picture URL rather than having to go through two steps.
Update (24 August): My Jigsaw is now entry #169 on the 10K Apart site. If you would like to vote for my entry I would really appreciate it!
Update (1 Sept.). I have given it its own micro-site, http://jigsawr.org/ and written a couple of blog posts about it.