I found a very useful site called http://septicscompanion.com. It's an English-English to American-English dictionary. It also has a lot of useful explinations of differences in ettiqute and common communication. All the while, this writes in a friendly, humorous way with things like this:

In Britain, there are only fifty-five minutes in an hour. This means that the day is 8% shorter, and so as time goes on, the day tends to slip a little when compared with the position of the sun. By the end of a month, people find that they’re getting up for work just as the sunset is finishing. In order to remedy this, a “leap day” is inserted into every second month or so – the specific months are chosen by the Queen in a televised royal proclamation. The ceremony, reminiscent of the historic “changing of the guard,” takes place at Buckingham Palace, the Queen’s official residence in London. The current holder of the ceremonial House of Commons position “Black Rod” approaches the Queen’s residence carrying the Mace, an ornamental staff normally kept in the Parliament. Watches in silence from behind a cordon by hordes of tourists, he knocks three times sharply on the Queen’s front door. The Queen emerges, often wearing her nightgown, shuffles around a little peering at the ground and shortly declares in a loud voice whether or not she is able to see her shadow. If she can see her shadow, a leap day is added to the current month oh, no, it’s no good; I just can’t keep this up. Back to why telling the time in Britain is different

It's nice to read an informative site that doesn't sound like a friggin' textbook.