Are there examples of working spell-checkers built into a web site?

Without the ability to update the spell check library and with all the possible variations world-wide within a single language, I wonder how effective a spell checker built into a community site would be. That, and when I've seen spell-checkers built in to Rich Text Editing textarea fields, I've always been disappointed.

I would agree with @Kragen - keep the checker close to the user where the user can adapt the spell checking.

Are there examples of working spell-checkers built into a web site?

Without the ability to update the spell check library and with all the possible variations world-wide within a single language, I wonder how effective a spell checker built into a community site would be. That, and when I've seen spell-checkers built in to Rich Text Editing textarea fields, I've always been disappointed.

Gmail has a spellchecker - I think that it stores new words in a cookie. In any case, the next time I connected, my "Ignore Word" words were once again listed as misspelled.

I would agree with @Kragen - keep the checker close to the user where the user can adapt the spell checking.