I tried to make a mosaic with FD's Flickr tools like I have done several times. Tonight for some reason, the auto cropping of the photos was not good.
I switched to Tabblo to see if that would do a better job and indeed it did. You can see the results here.
I also noticed that Tabblo has been purchased by HP. Nice move. I think I'll go back to trying Tabblo more frequently.
Note: I had stopped because the timing of the loads from Flickr to Tabblo was not sufficient for what I wanted to do. Now it appears, you can reference a Flickr set (which in this case I had already set up) so it worked out for me nicely.