Read all about the rules in the Wikipost of this master thread about Citi AA churning:

http://www.flyertalk.com/forum/credi...ost-first.html

Basically, you have to wait (12 to) 18 (to 26) months from your last card opening before you can successfully apply for a "normal" personal card again.

The exceptions are business cards, and (if you can deal with it) the super-high-and-not-wavied-annual-fee Executive card.

You're in a thread about this cards' benefits at AA, but you should go to the thread linked above for all questions about applying for Citi AA cards.