The article says nothing about production costs relating to profitability. I'm not sure where people fished those facts from.
What it does say is this:
"Lower prices will allow Sony to target potential buyers of Microsoft's $479 Xbox 360 Elite model to increase sales and narrow losses at the PlayStation unit, analysts said"
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Someone explain to me how Sony cutting the price of the $60Gig model by $100 will "narrow losses"??
That is an extra 4-5 games that have to be sold / console, to break even on each of these babies.
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This is a clearance sale. After these units are sold, the price returns to $599 - on the new, cheaper-to-produce units. Sony will make a lot more profit on those units - even at the $499 price - than the current units at $499. At $599, they are much closer to breaking even (throwing in an extra game that most people are not buying is just a smart marketing move).