I have a Sony BDP-N460 region !. it plays region 3 dvd's but it will not play imported region 3 dvd's though or it depends on the distributor of that disc if i'm not mistaken....you can correct me if i'm wrong.
There are purportedly Region 3 DVDs that can play on US-made blu-ray players (in my case, I own a Sony BDP-S550), but upon closer inspection, these "Region 3" titles bought locally (esp those produced by Magnavision, C-Interactive) turn out as region-free pala.