What can a lawyer do for open source?

zolltron writes: I have a friend who went to law school. He really enjoyed intellectual property law, and he seems to genuinely regret that he didn't end up as an IP lawyer. But, what's done is done, and he's not going to radically change career trajectories now. But, I think he might be interested in volunteering a little of his time if there was an interesting project he could get behind. Computer folks are always trying to figure out how to get involved in open source even if it won't be their full time job. So, now I ask you Slashdot, how can my friend use his expertise to help an open source project?