Ooooo, look what I made! It's a nifty calendar for the month of December. I used Big Huge Labs mosaic maker. I wanted to have a header row with the days of the week but the maximum number of photos you can use is 36 - I needed 42. So I decided to go with just the numbers, in a 7x5 grid. I used "white" images for the blanks. Most of the images just came from Flickr searches like "letter M" or "number 8".
You can find my calendar here.