ecurbj on 30 April 2008
Actually it shouldn't be a huge problem. You will expect this since it's so many GTA fans and the PSN probably wasn't maintenance enough to handle GTA IV.
It's my guess. I can understand how Microsoft did a maintenance on the server a couple of weeks ago. More than likely for a Spring Update and for GTA IV.
Sony will clear everything up with a firmware update soon. They did that with Call of Duty 4 at launch of that game and Assassin's Creed had some problems also. Just wait patiently for Sony to answer but meanwhile enjoy the online experience if you can online on the PSN :)
