Nope. I stole a peek at vBulletin's code, And it is using XMLHTTPRequest and innerHTML to post. It's why when editing your post it's so fast. That speed is what I want.
I'm looking at the dojotoolkit. I think it might work for me. I considered Tibco and RoR, but porting to Ruby isn't an option, and I see no wysiwyg support from Tibco. dojo has that support and AJAX support as well. but I can't seem to get it to cooperate with content from a database just yet.