Interesting article from The Christian Science Monitor:

The precedent for oval rooms in American affairs of state can be traced to George Washington. He modified chambers in the President's House in Philadelphia with bowed ends so that guests at formal receptions could all stand equidistant to the president. It was a symbolic expression of democracy.

More like this, please!

But here's the funny thing about ovals, or, in geometric terms, ellipses: Unlike circles, which are defined by a single center, ovals are defined by two key points, each, appropriately, called a "focus."

A focal point is a two-way juncture – a spot not only of radiance, but also convergence, the position that "takes the heat." ...

Yet during elections, undue hope blazes forth from ardent supporters. They project their light onto the candidates whose every action is a petition to their anonymous authority. The candidates reflect that focused light back as their own. The electorate, seeing hope and power as uniquely beyond themselves, get caught in a spell of their own making. Everything seems to revolve around the president.

But the seat of power, the Oval Office, has that other, unseen focal point, as if to indicate a room with two "centers" of responsibility. Could that be our spot in the room? Democracy, after all, is self-government. When the spell of the campaign is inevitably broken, we awake to learn anew the lesson of projecting all hopes and responsibilities, and the cost of not taking our position. ...

Perhaps there is wisdom in calling it the Oval Office. The word "ellipse" derives from a Greek root meaning "defect" and "falling short," as in not being a perfect circle. "Oval" comes from the Latin ovum, "egg," – birth and new beginnings, a place where our greatest aspirations might hatch and take wings.
President-elect Obama will soon occupy the desk at one of the Oval Office's focal points. He campaigned emphasizing the word "we." Like all presidents, his power will have its limits. Like all presidents, he will need our help. We, too, must exercise rightful government, even in the privacy of our daily thoughts and actions. By doing so, we make the move along with the new president, confident there is also a spot reserved for the American people in the room with two centers.

Let's just, er, hope that the symbolism isn't empty.