Like me, there are probably a lot of fresh new TextMate users out there in the audience thanks at least in part to MacHeist, so I thought it would be pertinent to point out a few helpful resources Allan Odgaard (TM's developer) maintains at macromates.com. Of course the searchable mailing list and IRC channel are handy for getting your discussion on, over which TM user Brett Terpstra just shared a WordPress templating bundle he's created - quite possibly a good addition to that theming workflow we just blogged.
Another powerful resource is the TextMate wiki, which houses a plethora of learning tools and resources such as a bundle repository if you're looking for some features or a language not included by default, as well as an RSS feed for bundle changes. Of course, what text app would be complete without user submitted themes? Last on my resource roundup (but by no means the end of what's available) are a few TextMate plugins, including a WebMate plugin that turns TM's Web Preview into a full-fledged WYSIWYG HTML editor based on WebKit.
There's a lot more from where all this came from, so dive in or simply get your feet wet with this swiss army knife of text editors.