Allow use of plugins with Grid

Not sure if this already a feature. Sorry if it is (and if so, some guidance as to how to use it would be much appreciated!).

Example:
http://sauceio.com/index.php/2012/09/introducing-the-sauce-plugin-for-selenium-grid/

So in other words, allow this plugin to run the standalone selenium RC jar file with a pre-defined plugin and / or additional CLI arguments.