allow me to comment on the next:
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3. See the obvious (the market is too small, <100 mails are too few). Ditch the project and move to ARM and focus on a CortexA9 board.
i'm not sure you could say that just based on the feedback emails - this is your core audience (or part thereof), but that does not mean that's your entire market.
a couple of considerations:
* my impression is that compilers still love the ppc architecture - with all the popularity ARM currently enjoys, it's yet to reach the level of compiler support that ppc (well, book e, at least) has had for long now. it's because the ISA was designed as the sane middle-ground architecture - nothing 'common' is prohibitively complex to implement on it (you need cheap dp fp - sure. you want sane SIMD - got it).
* how many non-x86 ISAs can boast with such excellent x86-borrowed pheripheral support? yeah, it's been mainly a matter or proprietary emu tech, but the plafrom at least has that. how many of us are running PC pheripheral cards in our obscure ppc boards - boards that 90% of the computing world has not even heard of? of all 'non-comformant' architectures, ppc has the biggest intersection with commodity tech. plus, we can build the bleeding edge linux kernels at the effort of setting a couple of build switches (and the occasional patch).
i know everybody 'prudent' is going ARM these days, and soon it will be a ubiquitous platform (if something that's already in gazillion of CE devices can become any more ubiquitous, that is), and that IBM cannot be arsed to move their little finger to put ppc back on the consumer-maket map (outside of a couple of hundred of millions of game consoles), but i thought the whole point of your effort was to cater to the ppc geek crowd, not to seek the greenest pastures (you could just as well re-sell atom boards to that end : )