Samuel Clay, founder of NewsBlur:

Starting today, NewsBlur now officially supports the new JSON Feed spec. And there’s nothing extra you have to do. This means if a website syndicates their stories with the easy-to-write and easy-to-read JSON format, you can read it on NewsBlur. It should make no difference to you, since you’re reading the end product. But to website developers everywhere, supporting JSON Feeds is so much easier than supporting XML-based RSS/Atom.

According to Clay, there are 15,000 NewsBlur users who subscribe to Daring Fireball. It’s very cool to see a feed reader that popular adopt JSON Feed so quickly.

The DF RSS feed isn’t going anywhere, so if you’re already subscribed to it, there’s no need to switch. But JSON Feed’s spec makes it possible for me to specify both a url that points to the post on Daring Fireball (i.e. the permalink) and an external_url that points to the article I’m linking to. The way I’ve dealt with that in the RSS (technically Atom, but that’s sort of beside the point) is a bit of a hack that’s caused problems with numerous feed readers over the years.