No word from Citi on this but it appears the rumors of Citi Prestige members getting Admiral's access are correct. American just listed it as an option in their Admiral's Club directory.
http://www.aa.com/i18n/travelInforma...tions.jsp#amex
Funny. If you look at the URL above it still shows #amex. Looks like they just renamed the Amex Platinum benefit and passed it to Citi Prestige.
I would expect more detail from Citi soon if AA IT is beginning to implement against a scheduled rollout.