Joel Spolsky (who started his career at Microsoft as a manager on the Excel team) has been writing some recent longer blog posts on a MacBook Pro in TextMate using Markdown. He describes the process in a recent entry. He calls it a “surprisingly good experience.”
He goes on to gripe about anti-aliasing quality (FWIW, that’s explained here), and beachballing from dropped wifi connections (which I’ve never experienced, maybe it’s an early Intel thing?).
But this is my 279th blog post written using Markdown, and one of many written with the help of TextMate, so obviously I’m with him there.