1. A wireless end-user device, comprising: one or more wireless modems to communicate Internet data over one or more wireless networks; a user interface; a wireless network data traffic policy implementation agent to apply a traffic policy to wireless network Internet data traffic communicated or requested for communication over at least one of the wireless networks; and one or more processors configured to: present, through the user interface, a first plurality of selection options to a subscriber, the first plurality of selection options for customizing at least an aspect of a first service plan element of a plurality of service plan elements of a service plan bundle, the first service plan element including wireless network Internet data access services provided over at least one of the wireless access networks, the data access services provided to or shared by the wireless end-user device; receive, through the user interface, a first user input indicating a first user selection from the first plurality of selection options; send, to a network system communicatively coupled to the wireless end-user device by one of the wireless networks, information based at least in part on the first user selection, the information for enabling the network system to provision one or more network elements to implement a customized service plan bundle based on the first user selection, the customized service plan bundle comprising a corresponding set of policies to allow, disallow, and/or count at least some wireless network Internet data usage differently in dependence on a device application to which the Internet data usage is attributed; and configure the wireless network data traffic policy implementation agent according to the customized service plan bundle, such that the traffic policy applied by the policy implementation agent includes at least one of the set of policies applied in dependence on a device application to which the Internet data usage is attributed.