Hi Barb and Phillip - thanks for your interesting comments here. My thinking in relation to this is that you can't design for emergent learning, which by it's very nature is unpredictable - but you can design 'spaces', 'learning environments' which might be conducive to emergent learning.
That's what we've been trying to do with our research - not design these environments oursleves, but explore with others what the factors might be that would contribute to such a space or learning environment.