Wahoo ... I think this is our first on display rack stack ... although some more commercial secretive maybe into that already (vlad, ArtForz, etc).
The racks/cabinets is going to be the way to go for bigger set-ups .... I think a few more months and more big iron techniques and engineers will start to take over from the gamers.
We could be looking at the end of the IBM dominance for big finance machines if this model for massively distributed/networked capacity takes off.