Not really. The only reason they even ported it to the 360 is because I believe it was easy (relatively speaking)...where-as the PS3 is so different they might not have the time or money to invest in trying to port it. Or if they DID, it might not be up to the standards they want. They're a pretty small dev team, so yeah.
Yep, I think that is true. Shame because in my opinion, The Witcher 2 is by far, the best 360 exclusive. I wish it was released for the PS3.