I'm interested to see what the USB problem is with the standard rpi release or if it is gone.
I'll use that as the base for testing, since that's what rpi release with it.
In general I avoid custom kernels+releases for a number of reasons (I've mentioned on the board before) but in this case I'll test yours also when I have time.
However, at this point even playing with this is time I'm short of.

Had the compile failed I probably would have delayed it until I actually got an ASIC because:
I've got my plane tickets to BFL - Kansas City today (email digital ticket details from the travel agent) from Josh
So I'm now short on time for the next month
I never get much done quickly - so the flight to the USA on the 17th Feb (my time) and a week in total, means there's stuff I need to get done before that - non BTC stuff also
I'll test it with your kernel/config when I get to testing the ASICs but your custom interface/mining management anyone can test and I'll not use it anyway.

My original interest with your custom version was to resolve USB problems, but if the problems aren't there any more, then IMO you are better to supply a script+downloads to produce your release from the base rpi release (of course if the USB problems are still there - then that's a completely different issue altogether) So for now I'll just let it run on wheezy-raspbian (2012-12-16) and see if it fails/crashes/drops the device at all.