I still don't understand the virtue of being a "serial entrepreneur", especially with no indication of what businesses were created. It just sounds like someone who bailed on several previous companies that aren't even worth mentioning.
They certainly should have elaborated a bit. It's Bill Gross from Idealab. He has a long entrepreneurial history and quite mixed record of meaningful successes and spectacular failures.
"Prior to Idealab, Gross founded GNP Loudspeakers (now GNP Audio Video), an audio equipment manufacturer; GNP Development Inc., acquired by Lotus Software; and Knowledge Adventure, an educational software company, later acquired by Cendant."