This may have been available for a long time, but I just found them on Snapfish. You can make 4x 6 collages for 9 cents each! I had a ball making these things from my favorite photos.
The possibilities of things you could do with these are endless. You can make 5x7s for .59 and 8x10s for $2.99.
You can put up to 20 photos on one. That is a pretty cheap and quick scrapbook page if you like to do hybrid scrapping.
If you want to try this, go to the snapfish store and look under "what's new". They say this is an "introductory price". I made a bunch of them, here are a few.