Which of the services did you use? Did it work smoothly?
I have used a few of these tools before (Picnik, Flickr, Flickr Mosaics), so I decided to try the ones I haven't. I liked the Image Mosaic Generator, but on some level, it's kinda creepy...if zoomed in on, there's lots of rather odd images going on. I uploaded a few different pictures to see what it could do, and thought that the results were pretty cool. It reminds me of paintings by Georges Seurat (or as my kid called him, "The Dot Guy")in that the minute details are interesting in and of themselves.
Here's the original:
And here's the mosaic:
I also made this on Collagr:
Can you see a use for this in your library? At home?
Yes, there are soooo many uses for these kinds of tools for both the library and home. The trick is to not lose oneself in tweaking the finer details of the photos. Not that I'm speaking from personal experience...well, yes, actually I am. :)