Thing 5 Mashup

Spell with Flickr was fun. Has some possible uses.  I read thru the 10 Best Flickr mashups and think I could get hooked on the picture Sudoku as I'm already hooked on the numbers one.  I think these things are for people with too much time on their hands!  Offers a chance to be creative and to exercise the brain but so far, I'm lost as to a function in the library/classroom.