Cameras rolled Monday in one of the busiest courtrooms in Massachusetts, recording murder arraignments, traffic, and drug cases in a new experiment: how bloggers and other citizen journalists can cover courts using new media and social media.

The business of a bustling courtroom in Quincy District Court began streaming live over the web for anyone to see. The courtroom, which usually does not allow reporters to use even computers, will now welcome laptops, iPads, and smartphones, and will encourage live blogging, tweeting, and Facebooking.