FORTUNE -- Here's Google's (GOOG) strategy for selling to the enterprise: Take a popular consumer product, make a few small enhancements and tack the words "for business" on the end of the name. Sound simplistic? Turns out, it works. Larger and larger companies are signing on for products like Gmail, calendar and maps. (Google's most recently announced enterprise customer is Spanish banking behemoth BBVA.) All of this despite the fact that Google has a relatively tiny team devoted to snagging corporate customers