The Post-It note has a bad rap. After Berger the narcissistic novelist dumped Carrie Bradshaw via Post-It on “Sex In the City,” the sticky yellow paper has been seen as a wussy way to get served. Of all the horrible ways a gal can get dumped, this message was by far the worst! But last night on the “Grey’s Anatomy” season finale, McDreamy and Meredith vindicated the little square. When they ran out of time to get married for real, the two exchanged memos, er, vows, and sealed it with their signatures on a Post-It note. We hope the marriage sticks too!