Well, it looks like I'm the first to get on board. I plan on playing for a few hours each night all week, so hit me up. I've been casually going for the MP achievements, but seeing as how reaching level 50 will take a good 40+ hours I'll just be enjoying the game for the vast majority of my playtime.
I think I still have Role Model, Abstergo Employee of the Month, Ahead of the Curve, and, of course, Download Complete. I've only played the 'Wanted' game type, so that's why I'm missing a few of these. Getting Strong Closer seemed like pure luck, I won in the last ten seconds by escaping a pursuer and the 100 points bumped me to to first place. Barely.