Who’d have thought the Google IPO craze would have hit the subways? Heading home last night, I stood lazily on the Q train platform at Union Square, iPod rolling. An older couple — say, late 50s or early 60s — walked up next to me and stood waiting. What first caught my eye was the guy’s hat. It was emblazoned with the Google logo. Then, I saw both he and the woman were wearing black Google fleece jackets. Hmm… my mind raced. Early investors trying to boost an IPO? Ridiculous, I know…. The whole IPO madness is certainly getting that way.