Robert Khoo single-handedly turned them into the empire they are today, with multiple IPs, games, conferences, charities and more. Details in this Wired article, halfway down, starting at "Back at the office":

http://www.wired.com/gaming/virtualworlds/magazine/15-09/mf_pennyarcade?currentPage=all

One of the rewards in their Kickstarter is that Robert Khoo does a comprehensive review of your business plan, for a backing at the $2500 level. This is ridiculously cheap for the time and experience of someone like Khoo.

http://www.kickstarter.com/projects/pennyarcade/penny-arcade-sells-out

There's five hours left to back it as of this post.