i dont think you can get other than astro that you can plug in, in pc and ps3.
but only for pc you should get logitech g35
There are a few headsets in the Turtle Beach range that are compatible with the PS3.
Although I have changed my mind because PC gaming is my priority for the headset and I barely ever play PS3 and even when I do I'm not chatting through PSN, I'm playing games in split screen with other friends.
So I'll be going with a PC headset, preferably with surround sound and USB connectivity. Do you know anything about the Creative Sound Blaster Tactic3D Rage? They seem to be a good choice.