Trac-TmBundle is a free bundle for TextMate that will provide you with some Trac wiki editing snippets, commands, and a language grammar.
I got an email from Softpedia today saying my Trac Textmate Bundle is now listed there. Pretty cool, thanks, Softpedia!
If you love Textmate like I do, and you use Trac, I hope you’ll give it a go and find it useful.