I'm thinking about getting the Palm Centro from Sprint. It would be on a brand new plan. I would be getting it on the SERO plan, and in the specifications, it says that there is unlimited web and data access. Does that mean unlimited WITH an internet card that it says I need to pay an extra a month for, or does that honestly mean for my service rate, I can surf the web? Any other information would be appreciated as well.

Also, if I didn't get the card, would I still be able to check my yahoo mail?