Nick,
Savvis was first by a very long time. As I understand it, they cooled to
the idea after a while. InterNAP came later, and executed (at least
marketing and sales-wise), much better.
Regardless of the hype, there's a big difference between a PNAP/POP from
one of these guys, and what is conventionally thought of as a NAP.
- Daniel Golding