Earlier this week I tried to generate a collage with Loupe, but it stalled on my perhaps rather large photo collection so I grabbed the Windows desktop version of the app (Mac also available), Shape Collage and generated a standard collage that gives a snapshot (pardon the pun) of my photo albums on Facebook
You should be able to view the high-resolution version by clicking the image. If you want to see the originals you can friend me on Facebook or simply view my public albums.