Those of you in the European Union can avail of EU law which says you're legally entitled to get a copy of all the personal data companies hold on you. People have made this requests to Facebook. Here's how: http://europe-v-facebook.org/EN/Get_your_Data_/get_your_data...
I can't find the original story, but when a guy asked for his data, some was missing and when he asked about it, Facebook answered it was their own trade secret and could not give them to him.
