I'm working at ELL-i Open Source Co-operative, ell-i.org. We're making Power over Ethernet HAT for Raspberry Pi B+ & 2. As we're interested in checking how our HAT works with other HATs, we made a media center which uses HiFIBerry DAC+ and Kodi to give a smooth user experience.
I absolutely love the end result, you can find more details at our blog.
Power over Ethernet media center with HiFiBerry DAC+