... [blah-blah] the number hasn't been zero since early 2006 in my quick boogle.
Seth comments: "Given that it was an MSFT employee, I think he was trying to hint that he's used both major search engines." (One would have to understand that there is a certain informal peer pressure inside Microsoft to a) not use google as a verb and b) use Bing as search engine.)
The reason I say that the term seems obvious is that it's a natural formation that moreover has been claimed already: there is the site booglesearch.com, which searches both engines and presents results side by side.
Beyond that, tho, things get murkier. (To me.) The site boogle.com does a Google search but presents you with a page that displays a quotation and a picture in lieu of the standard Google home page. (Oh.) No tie to Bing that I can deduce. There's Boogle the game, which looks (to me) like a trademark-skirting variant on the game I know as Boggle.
The exceptionally unreliable Urban Dictionary lists one definition of boogle as:
A negative result to having Googled a person; to be shocked or repulsed by what you find out about a person you have just Googled; to Google someone with the intention of finding out something negative about them.
But really, that's as much as I've found in my few moments of poking around. We'll have to keep an ear out.