I just got off the phone with AirTran. I didn't know that my 5 o/w biz class rewards were not converting BACK to credits. They showed me how to find the Business Vouchers on the website. He said he could convert them for me to Credits... but BEFORE converting them he warned me that if any of the credits had expired... I lose them. I asked how do I know before you convert. He said he would have no way to know before converting.

AARG! But, I believe they aren't expired.