I'm intrigued by lobste.rs user sign up model. You need to be recommended by someone:
miniblog.
Related Posts
I'm intrigued to see that Google has quantified that new code is generally buggier and less secure than code that has existed in your codebase for longer:
I'm intrigued by Twitter's new features to control who responds to tweets, but I worry it would create a bunch of moderation work. For better or worse, 'anyone can respond' is a straightforward model.
I'm really intrigued by Next, a scriptable browser. https://next.atlas.engineer/
There's definitely interest in alternative browsers designs, e.g. Conkeror and vimium.
The neat design of Next is that it's deliberately abstracting the underlying engine, giving future flexibility.