You can't get steam on your ps3. its just for Portal 2 so you can play portal 2 on steam (PC) and share the game saves to your Ps3
Hi, feel free to add me to http://steamcommunity.com/profiles/765611980408615
I added a few people from above also.
just completed portal 2 single player and looking for some coop fun plus i have a load of other games on steam and ps3 so feel free to add me http://steamcommunity.com/profiles/765611979933837