British/American English Dictionaries

Here are some links to some websites that have British English-American English translations. Some even have explanations of phrases and spelling differences.

http://www.peak.org/~jeremy/dictionary/chapters/differences.php
http://www.bbcamerica.com/content/141/dictionary.jsp
http://www.travelfurther.net/dictionaries/index.htm
http://www.scit.wlv.ac.uk/~jphb/american.html

Lonely Planet makes a nice little pocket guide called "British Language and Culture" that has a nice little dictionary in it as well as explanations of customs and foods.   We have a great time reading it to each other and laughing and because it's cheap, it was fun to get copies for my family, too.

What about these ones?

http://www.peevish.co.uk/slang/
http://septicscompanion.com/dictionary/a.html

I've found them helpful here and there.

I've found this one:

http://effingpot.com/