If I'm not mistaken, that data option no longer exists. Data is no longer classified into featurephone and smart phone subsets; all data is charged the same.
$15 for 200 mb; $25 for 2GB, with no option for unlimited data. Anything over your limit, AT&T charges extra. Although Verizon still has some unlimited data options for Droids and their new iPhone, they're moving to the 'data is data' model as well. It's what killed the Microsoft Kin.
One of the reasons they're likely doing this is to migrate people onto smart phones, from feature phones. If a customer makes the calculation that they're paying for the same data plan anyway, then why NOT get the smart phone over the, say, LG feature phone. And that's when they get you with MORE charges and fees....
I knew someone that worked for a carrier, and their internal metric which they measure employee performance by is, did Sales Employee X get the customer into the $100+ per month plan level? That's their magic number.