Forum OpenACS Q&A: Spell checker...
Check it out at this address: http://oacs4.polyxena.net/spellchecker/
Malte's plans for a spell checker were to make it an AOLserver module, I believe, while our spell checker is strictly meant for OpenACS.
Release, well.. Good question. We need to package it up and polish it a little bit, but if you are darn serious about using undocumented code, drop me an email, and I'll send you what we have.