It seems the Flying Blue exodus is continuing or why else would they be sending out nice little enrollment offers:
"Join Flying Blue now and you’ll enjoy 3,000 Bonus Miles if you fly with AIR FRANCE or KLM within the next 6 months*. All you have to do is enter the code ANRI when you sign up online."
Smallprint says:
Enroll until 31st March 2012. The welcome Bonus will be credited on your account after the first activity on AIR FRANCE or KLM within 6 months of enrolling. Welcome Bonus validity: from March 13th until 5th September 2012. Offer valid only for Belgian residents.
So make sure you have a Belgian address in your profile...