http://www.broken-notebook.com/spell_checker/index.php

See the above url for information on the hard parts, all I did was write the
plugin to interface with WP. To contact me mail fx@badc0de.net or visit the
blog @ http://raven.za.net

This "release" is just for people to pick it apart so I can spend some time
later on adding it to comment forms and automating (prettying up aswell)
more stuff.

To install put the whole fxsp/ folder into plugins directory, and fxsp.php into
plugins/ (you can basically just extract the archives inside plugins)