(1) Bonus Miles: This CitiBusiness® / AAdvantage® card offer is valid only for first-time CitiBusiness® / AAdvantage® cardmembers who apply pursuant to this offer for an account by
July 31, 2010. The American Airlines AAdvantage® miles will appear as a bonus in your AAdvantage® account 8-10 weeks after you have met the purchase requirements.
It appears that at least for the business card you are still eligible for the bonus if you've had another Citi AAdvantage card but NOT the business card.