I just noticed that the Google toolbar now has a spellcheck option that you can use with posts that you create. I don't know how long it's been there but it works very nicely and while our "Forum Tool" has a spellcheck module that I wrote, it doesn't work with FireFox and I assume this will. Two more advantages of the Google spellchecker is that it doesn't use a script (like mine does) and so it's not flagged by some firewalls, and you don't need to have Word installed.