A coworker, Craig Campbell just launched a new blog recently. One of the really neat things about his blog is how he handles syntax highlighting for code samples - check out examples in his interesting post about Cool Object Building with PHP. In fact, he got so many good comments about this approach that he even wrote a post explaining exactly how he does it: Syntax Highlighting for Your Blog Using TextMate.
Craig's process is as simple as selecting the TextMate bundle and choosing "Create HTML from Document with Line Numbers". The resulting output takes a little tweaking in the HTML and CSS, but the end result is quite nice (and better than several of the syntax highlighting plugins out there).