Location, Location, Location
Twitter to Add Location. Was wondering how this would ultimately be executed. It's at the API level and users can opt in to add location metadata. The teaser:
For example, with accurate, tweet-level location data you could switch from reading the tweets of accounts you follow to reading tweets from anyone in your neighborhood or city -- whether you follow them or not.
Just imagine if a service like Foursquare was able to send your actual location to Twitter alongside the name of the place you are at. That would save the people who follow you on Twitter but don't use Foursquare the hassle of looking up the location of the place you are at if they want to meet up with you.