I did a search and looked through the "related questions" section before asking this question.
One of the wonderful things about StackExchange is its "typewriter" like live-preview below the text-edit box. Now, I am a bigtime Tiddlywiki user and as other users might know, combining TW with Bob McElrath's jsmath plugin allows you to use TW as a latex notebook. The only thing that could make this situation better (heavenly, in fact) is if there was a plugin for TW which generated live-preview a la StackExchange. If not, does anyone know if this feature is available in some other Wiki platform?