AdventTweet for IPhone puts a simple object model on top of Twitter. ┬*
Users define their own objects and attributes like schedules, todo lists, chess game moves or status information of devices and expose them via twitter. ┬*
A free Reader for the objects is here:
AdventTweet┬*link in itunes:
An example is the twitter account DataModelUniver, if U follow him U will see his object model
in the AdventTweetReader.