Steve from Rockstar Games has sent word on the patch for the GTA IV version for the PS3.

Rockstar Games has released a GTA IV patch for Playstation 3 today that
prevents Gamespy's servers from being overloaded and therefore reduces
the impact on those servers that were causing the game to stutter and
lock up.  We continue to monitor the performance of the game both on and
offline and will provide further updates as necessary.  We want to
assure everyone that, together with our hardware partners, we continue
to strive to give our fans the best possible interactive entertainment
experiences possible.  This update will ensure that everyone will
experience Grand Theft Auto IV the way it was intended.  We apologize
for the inconvenience this has caused.