Betting abroad

Is there any change to the normal UK markets when using Betfair abroad ? Liquidity the same etc.

Any difference in time delays getting  bets on or is everything exactly the same as if in UK ?

Also can you avail of Betfair service in the US at all, on a different proxy server IP address hider job for instance ?

Anyone use Betfair on IPad or Iphone .. how good is it ? What sort of roaming charges can be expected, any tips on services that can give you great value for traveling around country to country while using Betfair for a few hours a day.

Any info or advice much appreciated