I emailed William Arruda about my work with Boundary Crossers. He's the founder of Reach Communications, a personal branding consultancy. He built his expertise in branding at places like Ogilvy and now applies it to successful individuals who want to be even more successful--by leveraging who they are.
William's comment on boundary crossers was interesting:
"I love what you are doing with boundary crossers. I do think they have an advantage in the personal branding process - much more differentiated than mono-experts."
Yet another facet of being a boundary crosser--more to work from in building a great brand in the marketplace.
See William's blog posting on Boundary Crossers for more of his thoughts.