The US Federal Reserve has joined Twitter, in an effort to improve interaction with the public and "accessibility and availability of Federal Reserve Board News." While the website remains the Fed's main channel of communication, it says that it will also promote major stories via Twitter, directing more users to the stories it thinks matter.

The first posts on the Reserve's feed center around Chairman Ben Bernanke's speech on community banking, reports on mobile finance and the financial crisis. It's a smart way for the reserve's publications to reach a wider audience directly, and with nearly 13,000 followers after just a day, early measures suggest it'll be successful.

Update: As readers have correctly pointed out, the US Federal Reserve is not a US agency.