The thread on the current best Citi AA offer, http://www.flyertalk.com/forum/miles...ey-appear.html, includes in the very first post a link to a post in a thread about an earlier Citi AA offer that sets forth the best current wisdom on churning these cards: http://www.flyertalk.com/forum/14386923-post2.html. Reviewing the post and the thread on the current offer should give you some insight, but the Cliff's Notes version: wait 20 months since your last application for a personal Citi AA card to make your next application and wait approximately 65 days since your last application for any Citi card.