My USAIR DM seems to have been converted to AADV miles after the merger. I want to buy Econ tix ATL-CDG or CLT-CDG and then use miles to upgrade to BUS. I can't see any AA non-stops ATL-CDG so maybe I shd use these miles for the nonstop CLT-CDG w USAIR??? Does anyone see a problem using AADv miles to upgrade a USAIR flight? I'd rather fly fm ATL, and BA does have a nonstop, but I read their prices and upgrades are tougher. Help! I have read that I must take care to buy Econ tix entirely on the airline w which I hope to upgrade so that's an additional concern.