The newest Facebook update features 5 of the most recent pictures you've been tagged in at the top. This feature also allows users to create a panoramic image, if they so choose. A website called Panorama Profile makes creating a custom panorama easy.
The website doesn't really explain how to use it. It took me awhile to figure out that you can drag the pink boxes around. There's also a plus and minus button on the right to adjust the size of your picture. To save the images, click each individual image at the top.
Upload to facebook & tag yourself starting with the last image. Overall, I think it's a neat concept. :)