Dave has suggested that I post this thread here.

I found a jigsaw puzzle over at flightsim.com. While this one doesn't allow you to save and finish later I thought I'd pass it on:

http://www.simviation.com/yabbuploads/Jigsaw120709.jpg

When I double-checked the location of the file, I googled it and found this:

http://www.netspeed.com.au/bhk/puzzles_air.htm

Check out the other links at the top of the page