It's really nice to see some amateur experimenters releasing the schematics for their designs again. Ever since I've been playing with radios, the scene has been very concerned with keeping designs secret. So much of the ham software is non-free (both libre and gratis), and the developers end up retiring, dying, or abandoning their work without ever releasing the code. Finding schematics for hardware is even more difficult and I've spent much of my time redesigning circuits (or reverse-engineering them from bought products or web pictures when I get stumped!).
Bruce, in your slides you mention that "The platform should be as close to Open Source and Open Hardware as possible without allowing Chinese cloners to eat our lunch – or we won't be motivated to make it." How much is this going to affect what is shared with the amateur community? Are you more concerned with making money off a product than pushing the state of the art in amateur radio. (Not that there's anything wrong with that, but there's a special circle of hell for people that see Open Source as a marketing term. Which doesn't seem to apply to you at all, Bruce, but it may still apply to this venture.)
One of the things that is holding back wider adoption of SDR is that SDR equipment from the new wave of manufacturers is often outrageously expensive for what is contained in the box. Will this be another $2000 SDR radio with $15 worth of parts inside it? (I know development costs money, but why must hams always charge for their hobby?)