"As the head of the [internal Sony] studios, it's hard for me to comment on the third-party relations, so I don't know the details of that -- we deliberately keep those separate -- but we have a great relationship with Rockstar and we're actually working closely with them on a number of initiatives, so I do know some things that are going on, but I'm not able to share those with you now."
This does not mean that Grand Theft Auto: IV on the PlayStation 3 will have downloadable content like the Xbox 360, but it's looking more likely that you PS3 owners will get something special. What that is we don't know yet, but stay tuned to TheGTAPlace for all of the latest updates on this matter.
Thanks Charger and Adriaan
Link: 1UP.com Article