qgil:

Magnatune has a similar all-you-can-download (as well as an all-you-can-stream) service without DRM. It sounds similar to Comes With Music; save that you'd then need to tie a device-specific ID (iirc, that's the wifi mac address on the n810 for the purposes of getting the flasher and updates) to a limtied-time subscription.

That's what came immediately to mind.