You take down a 10g connection and they bill each side $.2 a meg, 95th percintile billing.  VLAN between the two sites. Both sites have to have a different AS number.  So if you want to move 1g of data, 95th percentile, between 2 datacenters I guess it has some utility at $400 a gig effective pricing.   I can't beleive it is a great money maker for them. Oh and it's Cogent and they say they can't give you above 1500 mtu.

~P