yes, he has. as has substack. basically everything.
but part of the reason they are so prolific is that they focus on very small, single use modules that do one thing well. So they have hundreds of repos, but many of them are 10 - 15 lines of code.
That may be one reason, but the guy's responsible for Express, Jade, Mocha, Commander, and many others. I honestly thought visionmedia was a company until a few months ago.
The node-inspired `http-browserify` is my favorite; really nice, sane syntax for doing ajax requests that you can mix with client-side streams and transforms to do really advanced things with code that is clear and readable. Of course you have to use browserify to use it, but it's worth looking into.