<?php
/*
Plugin Name: WP Twitter
Plugin URI: http://room5.net/archives/wp-twitter/
Description: Automatically links @replies to twitter usernames.
Version: 0.3.0
Author: Matt Bannon
Author URI: http://ttam.org/
*/


function wptwitter_replace($content)
{

    $content = preg_replace("/(^|\s)@([A-z0-9\_]+)/", "$1<a href=\"http://twitter.com/$2\">@$2</a>", $content);
    $content = preg_replace("/(^|\s)\#([A-z0-9\_]+)/", "$1<a href=\"http://search.twitter.com/search?q=%23$2\">#$2</a>", $content);

    return $content;
}

add_filter('the_content', 'wptwitter_replace', 2);
add_filter('the_excerpt', 'wptwitter_replace', 2);
?>