|January 19th, 2015
You can use Doodle for things aside from scheduling, though, any time you want to collect yes/no from lots of people. For example, over the holidays my family used a Doodle poll to create a shared grid of which days people would be in town:
Each person filled in their own information, and then we used it for planning dinner, housing, etc.
I think Joel Spolsky is mostly right that "the great horizontal killer applications are actually just fancy data structures" and Doodle is a shared two dimensional array of booleans.