Spell Checkers Revisited

[Sivakatirswami]

I need to get an on-board spell check going asap for one of my  
apps... before I take Hugh Senior's stack and start re-working it for  
this specific use... I'd like to check if someone has already done this:

This spell checker wants to just do one thing: check all the words in  
a single field, against a stardard dictionary *and* a user dictionary  
with special words (foreign Sanskrit, "proprietary" terms etc.)   
highlight that word, give user the option to "learn" or replace with  
a suggestion.

Anyone have anything already functional along these lines?

Sivakatirswami