If what HHG (HipHopGamer) is saying is true ("PS3 costs $299 to build")and it most likely is, because he has been right on numerous occasions, then the PS3 really must be profiting.
We know for a fact that the $499 PS3 is profiting, there is no way it cannot be..
However if what HHG is saying is right, SONY make at least $100 profit off of the PS3 on the $399 model.
Now, if what he is saying is false and Isuppli is right (PS3 costs $420 to make, i think), then it must be profiting is some areas such as the following.
UK: PS3 sold for $444 (PROFIT) - £299
EU: PS3 sold for $590 (PROFIT) - 399 Euros
JP: PS3 sold for $436 (PROFIT) - 39K Yen
Now, i might be wrong in the prices but feel free to correct me and state your own opinion.