While everyone, well almost everyone, was fast asleep in London, Twitter quietly dropped a bomb-shell into their API announcements mailing list. Their new Trends API will help the service's users answer the perennial question "what's going on where am I".

So far, so geo but Twitter has noticed what I've been saying in my talks and accompanying decks for the last two years or so. "We're using Yahoo!'s Where on Earth IDs (WOEIDs) to name each location that we have information for -- we're doing so because those IDs give not only language-agnostic, but also permanent, stable, and unique identifiers for geographic locations.  For example, San Francisco has a permanent and unique WOEID of 2487956, London has 44418, and the Earth has WOEID 1."