heh, cross connects are indeed a major
issue. I have a need for > 10G transport. My equipment
supports 40G. The carriers aren't terribly interested in doing
40G transport (at least not at a reasonable price, one quote was
over 4x a 10G). 100G-capable switches cost too much. Equinix
charges as much for a pair of cross connects as a 10G wave.
Carriers aren't likely to be interested in using bidi optics or
passive WDM to overcome the ridiculous cross connect charges.
This all complicates how one chooses transport. There's no easy
path forward.