Sure, we've known of the Nokia N9's existence for some time now, a fact made all the more real by the handset's recent FCC appearance, but is a phone really real until its gets its first dramatic ad spot? Pocketnow managed to score a teaser for the upcoming QWERTY slider -- not the first time we've seen this thing on video, as those who can remember as far back as 2010 will recall. Interestingly, the UI seems to be consistent with the