While many are excited about live traffic data on firm ground, others have turned their attention to the other 3/4 of the earth. According to The Map Room, many ships are required to carry transponders to broadcast their location. The result is a lot of public marine data and the perfect situation for a classic map mashup.
Twitter co-founder Biz Stone has just announced a new geolocation API that will be available to developers fairly soon (Twitter API profile). The new API, which will likely be rolled out in Twitter clients before being available on the Twitter site, will allow users and developers to add latitude and longitude to tweets, thereby adding a valuable new layer of meta information to tweets.