I just applied for Citi AAdvantage Visa and Amex, $17,500 CL on both cards (when you apply for two simultaneously I think you always get the same CL). That is also the current CL.
I had applied for Citi Forward around April last year and they gave me a $7,000 initial CL and that is where it still sits. I know that wasn't one of the cards you were asking about, just mentioning it because they gave me very different CLs on the two cards. I didn't put a whole lot of spend through the Forward so not sure what influenced the larger CLs on the AAdvantage cards.
Starting Score: ~500 (12/01/2008)