Independent from what PlanetCrypto is working on, we've been thinking about building a 4U machine made for swappable boards and such. With BM1384 it'd put up 5TH, so next-gen chips would be even better. The plan was to make the layout fairly flexible, internal connections a generic USB bus, and publish the specs in case anyone else wanted to build boards for the same form-factor. Basically, an intention to define an open standard. Once I get back to hardware dev we'll see what happens.