If anyone is in the bay area and wants to run physical hardware and peer with folks, FCIX down in the HE facility in Fremont is very welcoming to small networks and doesn't have port fees (although you do need to be in the HE facility).
Equinix owns PAIX on 529 Bryant St. as SV8.
It's interesting how racks still aren't so much volume-, mass-, or network bandwidth-/transit-constrained, but power-constrained.
Even with what is now a "small" 5kW thermal power budget per 44U cabinet, measuring 24 inches wide x 48 inches deep, you can easily exceed that 5kW long before you physically fill the cabinet with servers.
You can only get so much cooling density. And loading up a rack can use a signifigant portion of cooling.
Its pretty easy now-a-days to get 18kW into a rack, which will require 5 tons of cooling. Ie. enough cooling to handle a 3,000 ft^2 house.