One issue that has worried me is how we are going to organize this in closed beta. Due to the NDA we won't be able to discuss it on the forums here. I suppose the best we can do is just post our character names (surely that's not an NDA violation?) here and on the steam group when/if we make it in before open beta so we can contact eachother.
But yes, they have said the technical test will be very short (it's just checking a bunch of boxes for different hardware configs) so I would expect closed beta to start in about a week.