One of my favorite new features of this Community Server software is the spell check. It works pretty similarly to Microsoft Word. Misspelled words are underlined in red. You can then right-click on them and the top section of the menu will give you alternate spellings along with the opportunity to add the word to the dictionary. Just click on the one you want and the word will be changed or added to the dictionary for you.
Unfortunately, it won't help you when you accidentally reference your sister by her maiden name.
Update: I feel like a dummy . . . it's Firefox 2.0 that has the spell-checker. I just updated to it at the same time I updated the website. I still love Community Server and also recommend Firefox.