Sorry to bump an old thread... but I would definitely be interested in this if it still has a chance to live.  

My primary use would be for ASIC mining.  You've turned out one hell of a OS for ARM. I love it on my Pi, but the limits of the rPi hardware are strating to become a problem.  Primarily the inability to use any USB3 hubs with out of the box higher power delivery.  The one other tough bit is that I can see where I'm leaving money (in lost GH from what I'm reporting to what the pool reports) on the floor because the rPi isn't quite fast enough.  When running cgminer directly on a more powerful PC I'm keeping nearly 100% GH of what I'm reporting, where as on the rPi I seem to be loosing between 5-10% GH right off the top. 

I'm trying to find a happy compromise right now between wanting the density and power delivery from USB3, and simplicity of install and management. 

As far as the GPU side of things, maybe now that cgminer (and bfgminer has hinted the same) has removed GPU support entirely.  It would appear the tide has turned and people are abandoning their GPU mining setups.  With the exceptions of LTC of course, but you have to imagine that scrypt capable ASICs can't be too far away at this point.