There are two options for utilizing a spell checker with this forum. The first involves a separate program called iSpell, and the second involves the current version of Google's toolbar.
The first approach provides the most seamless integration, but only works with Microsoft Internet Explorer (IE). To implement it, you need to install a separate freeware program that can be obtained from the following link.
Once this is installed, the check mark icon at the top right of the editor window can be clicked to run the spell checker after you have composed a post. This also works in editing an existing post.
If you are running Firefox as your browser instead of IE, you can use the Firefox version of Google Toolbar to implement a spell checker. This can be downloaded here:
With this installed, clicking on the "Check" button on the toolbar will run a spell check on any open browser dialog box, such as the editor box of this forum.