John:
According to the guy at Sprint (800-639-6111) tier 2 technical support - there are no more "unlimited" cards. Everybody has been converted to 5GB max. If you have any roaming MB used the Sprint site will separate those out - well that's what he said. Probably a good idea to check the usage at the end of each day. I do know that there is a 24 hour delay for data to be posted on the site so keep that in mind.
I know there are no unlimited options on sprint, but I also know I did some roaming data a few days ago and pulled that image off my page this morning...