They send statements to the UK every month but you do get a standing charge, its not a lot though about $7 I think. This was far outweighed by the much better exchange rate they offered by just paying Sterling straight into your BOA account.
You can get round this by setting up a reqular electronic transfer. I transfer around £100 per month from my Halifax account to the BofA account, there are no fees, and the exchange rate is good. This inward electronic transfer to the BofA account stops you getting charged the $7 or whatever it is account fee....
Before I go on holiday, I logon to my internet banking with the halifax, up the transfer to say £1000 for the two months before going, and so have money in the account when I'm there. I then just turn the electonic transfer down to £50-£100 per month when I get back.