New Assassin’s Creed: Brotherhood map to unlock

Ubisoft has challenged the Assassin’s Creed: Brotherhood community to play a massive 133,700 Assassinate Mode multiplayer matches in order to unlock a new map.
The news comes from the Assassin’s Creed twitter account, where the post was mindful to stress that those matches need to be played collectively. Asking the same of an individual would’ve been quite silly.

If the challenge is met, the map ‘Florence by Night’ will be unlocked for all players (and presumably across all platforms.)
I probably could’ve done with another night map to help me avoid detection when I spent a recent Evening With the game.