There are some interesting examples on this month's Absolute Sound, hosted on avguide dot com.
* micromega-400-integrated-amplifier-wireless-dac. It has it's own wifi network (!) and only works with iTunes.
* Electrocompaniet PD-1 USB DAC and ECI 3 Integrated Amplifier.
* micromega-400-integrated-amplifier-wireless-dac. It has it's own wifi network (!) and only works with iTunes.
* Electrocompaniet PD-1 USB DAC and ECI 3 Integrated Amplifier.