I usually just copy the text from the forum message entry page into a local spell checking window on my PC for verification and then paste it back here if I am not sure of something. The http://dictionary.reference.com/ site can also be helpful.
As fer as I'm kuncerned, spilling don't count. I make no gugements on how a feller or gal spels. I don't mine wading thru a few misspilled werds. Afterall it's the kon-tent that counts.