Some added notes. Attorneys already look up juror's facebooks/twitters/etc if they can. I would just be helping them use that data. I would try to automate as much as possible, but even if I can't there is still plenty of data to look at.

Also, I've not really explored this avenue much, but any information brought up in this investigation or given to attorneys becomes a matter of public record. It seems like there would be a great deal you could do with that, but I'm not really into the personal data selling thing.