Losing $500 is a laughable number. Maybe based on first year pilot production, but not on the A2.
I work for an company that makes mid-volume products, I do engineering cost analysis for a living. Even if the A2 was costed at $600, the real price is often a fraction of that. Let's say we analyze the cost of my design at $100, the real materials and labor is usually a tenth of that. Often a huge chunk of the number is overhead and tooling, and that is usually budgeted for 1 year or less; if Toshiba planned on a 9 month sales life cycle for the A2, then $90 of the $100 is already paid for. Plus, you must remember, in some other countries they pay 2-3x for CE goods; that helps termendously with the US getting goods at or below manufacturer cost. My company does this ALL the time; customer "A" buys 100 units at cost customer "B/C/D" buy 100 units total at 3x the cost, we still make a huge profit because "B/C/D" buy in smaller lots and will not complain about the price. I travel to the EU frequently, and often see the same models of CE stuff selling for 2-3x more than what we pay in the US; IIRC the PS3 was selling for ~2x the US price.
I am not saying that Toshiba isn't losing SOME money in the US, but they certainly have a global strategy to stay afloat.