Credit:
Bear in mind it's a very simple and utilitarian client that runs from the command line -- not a nice and flashy graphical user interface version like TweetDeck or Seesmic Desktop. Still, it speaks to both the apparent ease of use of both Go and to the elegant simplicity of Twitter that a new language could be learned and a client whipped up in all of two days.
You can download the source code for Mac OS X and Linux from the project's website and check it out or modify it. If there are programmers in the house, please feel free to drop a comment and compare how this version stacks up to other implementations of command line Twittering.