Someone has done a study of the relative funniness of the justices of the Supreme Court, according to a NY Times story. To no one's surprise, Justice Antonin Scalia was been found to be the funniest, based on the number of times "[laughter]" appeared in the court transcripts of the 2004 term. Scalia is known to be a quick wit, and many feel he deliberately plays to the crowd. (He's a bit behind Breyer this year, but he's got plenty of time to catch up.)
Personally, Justice Scalia provokes more tears than laughter. I guess it's too much to hope that after seeing this study he'll resign from the Court for a career as a comedian. "Here come da judge, here come da judge" (warning: you have to watch a commercial before viewing the clip).
8 hours ago