Portal 2 will release on April 21 this year, and it will come with very special feature. Portal 2 will support the cross platform connectivity between the PS3 and PC.
Yes, you thinking right, PS3 players can play with PC Players in co-op mode. EA employee has confirmed this Cross-platform support to the PressXorDie.
This will make it possible to play the co-op mode between the PC and PS3. Furthermore, it will be first title to include the Valve’s 'Steamworks' package, means there will be automatic updates and Steam Cloud support. With Steam Cloud, the scores are stored online and can also be found on other PS3 or PC.