Log into your account. Ignore the drop down box. Click on Flying Blue on the main page navigation and you get a page identifying the benefits of the scheme. On the left hand side you'll see a list of menu options. Click on Manage my account. You'll get to request a new card or print out a copy of your card. Click on the option to print out your card and you'll see the expiry date on your card.
Based on what I've seen over at mFT, it would appear that you get at least 12 months of the matched status on top of the balance of the remaining membership year, much like QFF. If you'd gotten status matched in March 2011, your status will expire in March 2012 as you'd get your 12 months worth of status. If you get confirmation of your new status from April 2011, your status will last through March 2013 to ensure that you have at least 12 months of status. Some things are worth waiting for.