SpiraClock: A Visualization Technique for Nearby Events
emn.fr
emn.fr
http://www.youtube.com/watch?v=ZG_rOWDPCeI
I love the zoom on the clock here...I bet this could translate to touch devices really easily. First to implement this in Protovis (http://vis.stanford.edu/protovis/) wins!
The use case cited is bus schedules, but it is really quite broadly applicable. Any time you have something "coming up" you can see at a glance how much time you have left till then.
I think many more people would use this if it was turned into a product, rather than an SDK or a collection of .jars.
EDIT: Found it! Check out HeliCal: http://www.lri.fr/~dragice/helical/
edit: actually ment usefull instead of cool.