March NPDAnalysis on Monday, but here are the numbers:
Wow. That's a total of 1,456,000 units. Last year? 865,000.
I have NPD data back to November of 2001 (thanks PCV Console), and if you're trying to put the Wii's numbers into perspective, the second highest March total for a console since 2001 is 500,000 (PS2, 2005). That's also the biggest non-holiday (November or December) month since 2001 as well.