Dave Winer tweeted this on Saturday:
I have a little spare time today so I decided to start on River3. It’ll be much much smaller and more focused than River2.
— Dave Winer ? (@davewiner) April 13, 2013
One of the things I love and admire about him is that many, many years after he doesn’t have to anymore he’s still learning, hacking, and taking free time on a weeknd to make something new.