I thought Honeycomb had moved to using MTP, which is originally a Microsoft but now widely supported protocol that various Linux applications and libraries talked?

edit: reading the relevant part of the review, it is using MTP, which has built in support from Windows. Google is providing an app to add support on Mac OS X, on Linux it seems you need a recent version of libmtp and support from your music app. The link provided seems to be a way of making it appear like a mounted drive, as previous Android versions have done by default. Many small hardware music players have a firmware switch to change between USB and MTP mode so you can use either at your choice but I'm guessing that the extra SD card slot (which currently isn't working) will provide that capability for those that prefer it.

And yet there is a functioning work-around that is extremely simple: https://supportforums.motorola.com/message/332363