A bit of warning switching a card around to use on different idines. I deleted a second card from my AA idine and used the card number for a new AA account for Mrs. Outoftown immediately afterwards. It messed up both accounts. I had to deal with idine's IT personnel and the airline reps to straighten it out, but now I have a new login on my account. I would recommend waiting a day after removing a credit card before adding it to another account. I currently have skymiles, nwa, united, us, co and aa accounts with idine on separate credit cards. It pays to have different airline accounts because different promos are offered each quarter and some are better than others. I've earned 30,000 off of two United promos in the last 3 quarters and over 15,000 AA miles so far in AA's 250 mile bonus promo this quarter and another 5000 miles in a different AA promo in the 1st quarter.

As to idine having the same call center, I was fortunate enough to deal with CC, a rep for United idine last month and working the AA idine this month. She was extremely competent and helpful in both cases.