Check out this demo video of a new plugin by mitcho, called HookPress. HookPress adds the ability to use webhooks as WordPress actions and filters. Since webhooks run from a web server (not directly inside WordPress), this means that you could, for example, use scripts in python, perl, ruby, or whatever to extend WordPress. How’s that for nifty? And what’s extra nice is that the user interface for it on the WordPress side looks super simple to use.