The Twitter ecosystem may be changing constantly, but most of that comes on the back of individual developers and outside companies. They beat on Twitter APIs to create new products that may win them glory, recognition or cash. Over the past month, though, Twitter itself has gotten into the game, releasing or announcing a handful of new features.
A new function for “retweeting” (echoing another’s tweet to your own followers), changes to how trending topics are managed, and the ability to create lists are new tools intended....