Where are all the students who passed the bar and are looking for work. Why not take a few of these cases? Isn't that better than waiting for a job offer that maybe isn't going to happen? And if a job offer does come, wouldn't it be better to show the firm some actual courtroom experience?
It also gives someone who passes the bar a legitimate excuse to contact a legal firm for some simple advice. I bet legal firms would rather give small amount of time helping out someone who is learning the ropes, then taking endless calls from people who are looking for work.
If you're a not yet hired but passed the bar kind of person, why not get involved in this type of a case and make a NAME for yourself.