I saw that in the latest PS3 OS update, they added Facebook integration
. Now, there's one and exactly one thing that could possibly be useful for, right? You've already thought of it in the time it took you to read that sentence. The one useful thing would be to unify your friends lists, so that your PS3 can automatically know which of your Facebook friends are online without you having to search for and then manually enter all of their Playstaion Network IDs.
Guess what, it doesn't do that. All it does is make it so that the PS3 can spam your Facebook Status every time you buy a game, and every time you upload a trophy. Who would ever, ever want it to do either of these things?
I'll bet a "Social Media Consultant" was involved.