Got one on my first try.
Queued up at Nintendo NY around around 8:15. There were already about 30 people in line. Wristbands were handed out around 8:45, and the doors opened at 9. One per customer, per month. Photo ID and debit/credit payment required. Saw a lot of resellers. One guy was cycling through a bunch of IDs, lol.
Overall a good and easy experience. As long as you line up around 8, you should be fine. The only gamble is whether or not they'll have stock that morning. Not sure if they do every day, but they've been tweeting a few times per week at around 8:45 indicating that they'd be handing out wristbands at 9:00. They usually sell out within two hours. When I left around 10:15 (browsed and ran errands in the area), the line was two blocks long and the tweet had just gone out that they had sold out.
EDIT: Anywhere to get the official controller?