Thought I'd share this here. We're using Semantic+UI with React for a new Meteor application. We develop the components in Kadira's Storybook app, which allows you to design your UI without needed to run your application. Here's a boilerplate project which you could clone to see how we set things up. It has sample stories for a simple progress bar component we made and also stories for the stardust Button component
you should run
npm install after you clone.