In an interview with Videogamer.com, Sony Europe chief David Reeves had some cryptic thoughts about GTA 4 DLC on the PS3

Well I think you probably will see it, it’s just that a deal obviously was struck between Microsoft and Take 2 to do that. And if that’s what they want to do, I think that’s the last shot they have.

His suggestion to push this along is, if you’re a PS3 GTA 4 owner, e-mail Rockstar and ask them what’s coming.