With tomorrow a US holiday (Washington's birthday), it looks to me like we have 10 US Postal Service delivery days left prior to March 3rd.
Guessing that they don't want a lot of calls & problems due to late credential receipt, so new creds are probably going out early this week, if they haven't already. Especially for international members, where I would expect longer shipment times are needed.
In which case, we might expect initial receipts to begin late this week...
So, speak up:
Did you receive your 2012 MP credentials? And whereabouts do you live?