Think Globally, Tweet Locally – As promised, Twitter turns on its geo-location feature. Note that you must opt-in to use it, but app developers are being urged to push their users to do so.

What Twitter’s New Geo-location Makes Possible

What’s Happening? – Twitter changes the prompt above its input box from “What are you doing?” to “What’s happening?” It’s a subtle but important shift, reflecting the service’s increasing role as a provider of news.

Twitter Premium Accounts Due By Year’s End

Twitter urges Murdoch to be open – Twitter’s Biz Stone says newspapers must become “radically open” to succeed in the online world.

Twitter/Facebook Client Brizzly Open for Sign-Ups – Brizzly is a very nice interface; give it a try.