I've had lots of requests for a DAC kit and have done a fair amount of preliminary design work. I was veering towards the Wolfson chips in a differential configuration, but a simple DAC would be possible as well. I guess a bit of feedback would be useful; would you like to see a low cost, easy to assemble dac kit with good ( but not outstanding ) performance, or a very high performance but relatively expensive DAC? One problem with DAC kits is that you can't get away from surface mount components. So would you like to try soldering the surface mount components yourself or would you like to pay a slightly higher price for pcbs with the surface mount components already soldered on? Of course I'd offer assembled and tested DACs as well as kits. However, don't hold your breath, as my design and development time is severely limited by the current volume of orders.
David