I'd seek help.
While my mom has her PHD in Child you know what I think her answer is immersion and not a computer or game console.
However my first thought is seek more help. My second though is try a Wii since it's a pretty social device compared to the PS3/Xbox machine. There are also portable Nintendo's that a friend's autistic child loved but remember it's not building person to person skills. I don't want to debate anything about this area but thought I'd share my thoughts.