Spelling cow
I am a lousy speller... The lack of integrated spell checking has been one of my pet peaves with peeves as well as Movable type. Now there is SpellingCow, which allows you to have a gmail-like spell checker in any form by pressing on a shortcut on your bookmarks bar.
I dunno, man. Have you ever seen a Chick-fil-A commercial? Cows don't really spell all that well.