You have read this article time-wasters with the title Photo mosaic generator. You can bookmark this page URL http://jenkrebs.blogspot.com/2007/03/photo-mosaic-generator.html. Thanks!
Here's a fun online tool. Upload any photo, click a button, and presto! Your image is converted to a mosaic made of tiny photos from Flickr. Above is my original photo next to the finished product, shown at 10% size, followed by a full size detail. Very cool. Try it here!