@marco1 - It is available, but it is not in full production yet. They are still working on the software and an upgraded DSP module.
I do have one and have been playing around with it for the past few weeks. I haven't had a lot of time to spend on it yet so I haven't gotten very far. In addition to my work, I have a couple other DIY audio projects that are taking up some of my time.
I'm planning to attend the Capital Audio Fest in a few weeks. Al Clark (the head guy at Danville and HW designer) and Richard Hollis (who has done a few active crossover implementations with this unit) will be there and I'm looking forward to discussing the dspNexus with them.