Once I have a working board with or without ASICs I'll work on some DIY docs to help people put these together themselves using a home reflow process.
It will be interresting to see how the encapsulation of these chips are, some say the QFN are plastic, that would be interresting with hot-air?
Keep in mind that each board has 250 odd parts, mostly tiny 0402 capacitors that will need to be placed with tweezers. You don't want to make a lot of these by hand.
I gues using 0402, 0603, 0805 doesnt make too much difference to the design, other than the bigger, the easier for the DIY'er?
My plan is to offer a kit for DIY users including board, stencil, parts, docs that they fill with their own ASICs. Whether this plan works out I don't know but I will be making mine and will use that process to give others a head start. Those who don't want that hassle will surely find that assemblers pop up to satisfy their needs. I'll probably set up one of these "instant free bitcoinstore" deals to offer the kits and other nice things for either bitcoin or paypal (or ASIC chips traded in lieu of bitcoin, because you can never have too many).
If you go that route, stencils + pcb's, that's very interresting, but, could you adopt the stencil8 system?
http://www.hoektronics.com/2012/10/27/super-simple-smt-stencil8/https://www.tindie.com/products/arachnidlabs/pcb-fixture-block-for-solder-paste-stencilling/supereasy system for DIY usage, only needs 2.5mm holes, on an 10mm grid at clever places.