http://www.trustedreviews.com/peripherals/review/2010/05/13/BeBook-Neo/p1

Overall a pretty fair review. Does the MP3 not work yet with the Neo?

http://www.trustedreviews.com/peripherals/review/2010/05/13/BeBook-Neo/p1

Overall a pretty fair review. Does the MP3 not work yet with the Neo?

Hmm, if it was a little bit larger that would be a nice alternative to the iRex DR800 (given that iRex has a policy of shipping their products with beta/unfinished firmware). I wonder about its PDF displaying capabilities. Does it use the Adobe Mobile Reader SDK? What about zooming and panning?

Pretty fair review, but they did get one thing wrong: the Neo does support mobi, only not with DRM.
MP3 works with the latest firmware. And you could always load the Onyx Boox firmware, which has had MP3 support from the start.