I have started using react.js + flux and I really like them. But I wanted to check what is your stand about the patents clause. Are you using it for your startup or are you steering clear? Also if you are a consultant/freelancer, are you using it for your client's project?<p>I fall in the second category and I am not sure what should be the things that I need to consider before I start using it for my client's work?
Staying clear for now. I'd love to play around with it a bit, I think there are some real neat ideas in React...but there are other alternative libraries out there, and I'd rather not use something that would significantly damage my negotiating leverage vs. Facebook.
It's only a matter of time before React is replaced by a new, "better" frontend framework with superior licensing. I love React, but for now, I think Meteor suffices.