I just checked the ATT-pages and it seems that they have added value:
https://buyasession.att.com/sbd/unau...iateSBD.action
DataConnect Day Pass - 100MB $15.00 100MB maximum usage over 1 day on the AT&T network
DataConnect Week Pass - 300MB $30.00 300MB maximum usage over 7 days on the AT&T network
DataConnect Month Pass - 1GB $50.00 1GB maximum usage over 30 days on the AT&T network