not so long ago I discovered Stylus and decided to try it out. I'm using a plugin which converts LESS code to CSS on save in SublimeText2. So I created a similar plugin to convert Stylus code to CSS using styl.heroku.com service. It is VERY basic as I'm not really familiar with python but I thought I should still share it.
I should warn you that unfortunately it doesn't work with multiple Stylus files. That is, you can't use @import inside your Stylus file because the plugin uses remote service and it doesn't support multiple files (as far as I can tell). But it could still be useful for some basic stuff.
Anyway, maybe somebody will find it useful. Cheers.