[williamstein]

SageMathCloud (https://cloud.sagemath.com) has similar functionality (collaborative editing, preview) and supports restructured text. To try it, create an account, project, and new file that ends in .rst. It renders the rst server-side using rst2html in Linux, so isn't instant (since not in Javascript) -- are there any good rst to html converters written in Javascript? SMC also runs aspell (server side) when the file is saved. Here's a screenshot: http://wstein.org/misc/smc-rst.png of https://cloud.sagemath.com/projects/4a5f0542-5873-4eed-a85c-...

(Disclaimer: I started SageMathCloud and SageMath. SageMath uses Sphinx for documentation, hence we care about RestructuredText editing.)

[halosghost]

Just as a quick note for you. Be aware that certain directives in rst can be security risks if you allow them to be run arbitrarily by users. If you haven't already done so, you should probably look into that.

This seems like an interesting service, I will need to take a look at it, thanks!