Hi
You do need licenses in both countries to be able to use it though.
- In the UK, you need a IFL, and in the US I think its a "214"
For some cables you need to worry about the backhaul (ie the bit from
the coast to where you want it) which can be significant, and sometimes
not available on the same purchase terms (ie once of large payment and
small shared maintenance charges) Gemini and AC1 both have "city to city"
prices which effectivly means from one of their "on-net" buildings in
New York and in London. ($11m seems to be the price for city to city, $7m
just for the wet bit)
Now heres the downside :- If the cable breaks, you have no connectivity.
The 250k/pa maintenance doesnt give you a recovery route. Most telcos/cable
owners negotiate with other cable owners to give them a backup path - for
instance (I think, Cantat3 backs up to Gemini and vice-versa) - I dont
quite understand what happens if theres not enough B/W on the backup cable
spare, but I would assume that those people who own sections dont get
the backup bandwidth ..)
And, also, you dont have someone to shout at when it breaks 
And, also, the cable wont get repaired if its old and breaking (ie the
cable has a life, assume 10-15 years)
You also risk the price of B/W coming down rapidly as WDM takes off, thus
leaving you with something you bought expecting 10 years use for $11M but
the price of STM1 being much less in 5 years time 
Cheers
Richard
In a previous message Hank Nussbacher wrote: