The culmination of the Ph.D. is supposed to be the creation of an independent and self-sufficient scientist who can continue to contribute to the scientific enterprise.
A Ph.D. is great on fundamentals--it teaches you how to make something completely on your own--but it falls short on the practical stuff every entrepreneur has to master.
"I, like every other graduate student I knew, developed a sixth sense for knowing when the dean's office had leftover hors d'oeuvres after a reception."
Government grants for technology-based businesses are very similar to those you might win in academia, but because they are given to small businesses, there is an added focus on technology commercialization.
If you have any interest in management consulting, investment banking, or quantitative finance, these information sessions may be a valuable window on the recruitment process.