There's also an "unboxing video" from Dr Ian Cuttress and Jasmina Vasiljevic from a few months ago: https://www.youtube.com/watch?v=WJpJkvNw9Ts . It's a bit out of date because a lot of the stuff that was promised as "coming soon" has actually happened.

I personally think making this open source is huge and am cautiously optimistic that the hardware has potential for general purpose parallel computing, so I've ordered a card.