Remove the fact one must reside in Japan for the following post, it appears only the trendy cool kids will be getting the Napster branded MicroSD card for the new Napster direct-to-mobile download service. AT $82USD for a 512MB MicroSD card, when any will work, is pricey for storage. The Japanese Napster direct-to-mobile service does require a MicroSD card for sync functions – would you care? Probably not.
Napster direct-to-mobile service is offered through NTT and uses DoCoMo phones.
Source: Engadget, DoCoMo, Napster