I just released version 1.2 of my Textmate Trac bundle. It includes an awesome new Preview command contributed by Tudor Marghidanu. While editing a Trac wiki page, just hit
command-option-control-p (same as Markdown, etc.) to pop up an HTML formatted preview of the page. Seriously useful. Thanks Tudor!
sudo perl -MCPAN -e 'install Text::Trac'