When you press the "PS" media button during gameplay you will only see a black option screen. (Quit Game/ Controller Settings/ Turn Off The System/ Turn Off The Controller) Every PS3 title being made these days allows you to use the Cross Media Bar upon pressing the PS button for checking or sending messages, seeing who's online, Text chat, etc... I'm not sure what other early PS3 games also have this issue.
I hope this news turns out to be true. I picked up this game ages ago and I never got around to playing it. If they added trophy support, it would give me incentive to dust it off and finally give it a go.