Both these mash ups make use of an individuals twwiter updates.
Twistory maps your daily/monthly twitters across your calendar to act as your own diary for you to look over : autodiary making over time.
TwttrStorm makes uses of wisdom of crowds and mass colaboration where you can ask the twitterers a question and receive an answer. It suggests a way to get mass opinion in an instant whether its to spark debate, get feedback or validate a prediciton. This also suggest the opportunity to make a self fulfilling prohecy. This predicitve feature is similar to the way inklingmarkets works and in some ways a paired down version of the more indepth MMORPG simulation environment that SuperStruct offers.