HifiBerry has just posted a preview of the new board for Raspberry Pi B+:
http://www.hifiberry.com/2014/07/preview-hifiberry-dac-for-raspberry-pi-b/
On a side note, if you were expecting better on-board audio from the new B+, you will be disappointed. The guys behind HifiBerry have done some measurements:
http://www.crazy-audio.com/2014/07/sound-quality-of-the-raspberry-pi-b/