Simple production ready boilerplate for React, Webpack (SASS and React hot reloading), tests and coverage. Check it out.
Took the time to rewrite the site (once again) to use a more optimal structure and a setup that will eventually result in less development effort.
webpack allows you to use hot reloading of your modules. Sure, let's do it. Using hot reloading of React modules and SASS (using libsass, by the way) the development flow is just flawless. It just works. Try it out or look at the code on github.