After several requests and some research into a spell checker for the forum I have discovered several tools that run client side in your browser that seem to work well.
For Firefox users with version 1.0 there is a great client side utility called Spellbound, download it here:
http://spellbound.sourceforge.net
For Firefox users the new version 2.0 has support built right into the new version. Mis-spelled words will be underlined in red, just right mouse click and correct the spelling.
For Internet Explorer users there is ieSpell a very good client side utility, download it here:
http://www.iespell.com
When vbulletin detects the iespell client the spell check button becomes active like the example below.
