**How I did it**

***setup***

* install [node](http://nodejs.org/#download)
* install node's package manager, [npm](http://npmjs.org/)

***installing packages***

* search [nipster](http://eirikb.github.com/nipster/) for "twitter" and "growl" packages
* `npm install ntwitter`
* `npm install growl`
* check out the docs for [ntwitter](https://github.com/AvianFlu/ntwitter) and [growl](https://github.com/visionmedia/node-growl)

***making the script***

* get some [API keys](https://dev.twitter.com/apps/new) for a new Twitter app
* code up tweets.js
* `node tweets.js`
* get growl notifications when there's a #wwcode tweet!