I still score geek points when I demonstrate this function to other Emacs users. I wonder if the word list is still maintained. Last time I checked it was getting a little dated.
Also, please bring back M-x yow. (I know, copyright this and that, etc.)
It's still there afaik, but you need to download the `yow.lines' file separately and put it in the right place or M-x customize-variable yow-file to point to it.