If I'm not mistaken you can select AIRMAIL from MyMALLBox (as per one of the earlier posts). The cost is around $2USD.
I got an e-mail my shipping date (originally scheduled for Friday got moved to Monday -- likely due to Thursday & Friday being holidays in the US).
I have well over 50 "friends" now on freedompop. If all them of requested data sharing at once I'd be screwed. LOL.