I believe that if you use Compass, it has a command line utility that watches for changes and then compiles the appropriate files automatically when changes occur. This makes your workflow similar to working with css where you have refresh to see your changes.<p>See documentation for more detail:
<a href="http://wiki.github.com/chriseppstein/compass/command-line-tool" rel="nofollow">http://wiki.github.com/chriseppstein/compass/command-line-to...</a>