I just noticed this in the API wiki, under the statuses/update method: "Currently, all geolocated information will be removed after seven days."
Two questions: 1. What exactly will be removed: the geocoding attached to the tweet? Or the whole tweet? 2. Why? I.e., why remove the geocoding or the whole tweet? I can think of many use cases where it is important for the geocoding to remain as long as the tweet remains. For example, I take a great vacation picture, upload it to Twitpic, then tweet about it, including where I took it. The location where I took the picture remains the same forever. Why delete the geocoding information from the tweet, or the whole tweet. This will just cause folk to put the geocoding information in the text of the tweet, taking up valuable space and reducing the value of geocoding tweets, and cause developers (Like me, admittedly) to develop applications that put the geocoding in the text of the tweet. With applications like that available, twitter users are less likely to go to the botther of opting-in to twitter geocoding of their tweets. Comments expected and welcome. Jim Renkel