(Old) Version 1.1 Instructions (this version does not have support caching)
Disclaimer: This widget will not work with accounts that are locked.

Download this javascript file: TwitterWidget.js and upload it to your webserver where ever you like. Remember where you've uploaded it. Copy the following html into your website right before where the body tag is closed (</body>). If using Wordpress you can find the closing body tag in footer.php of your theme.

<script type="text/javascript"><!--
  var rpnetTwitAttrs = {
    usernames: "RonakPatel,TheOnion",
    count: 5,
    title: "Twitter Updates",
    showImages: true,
    imageHeight: '48px',
    imageWidth: '48px'
  };
// --></script>
<script type="text/javascript" src="TwitterWidget.js">
</script>

Attributes that need to be updated:

usernames - Put the Twitter accounts you would like to stream here. No limit. For example: username1,username2,username3
count - The number of tweets to display.
title - The title above the tweets.
showImages - Display user images or not.
imageHeight - Set the height of the user image.
imageWidth - Set the width of the user image.

You also need to update the src="TwitterWidget.js" attribute to point to where you uploaded the javascript file. For example, src="http://yourwebsite.com/uploads/TwitterWidget.js". Copy the following html into your website where you would like the widget to appear. If you are using this with Wordpress you could copy the html into a Text widget to make it easier to move around. If you use the Text widget make sure you empty out the title string above ("") as the Text widget sets its own title.

<div id="rpnet_twitterWidget">
  <h2 id="rpnet_twTitle"></h2>
  <ul id="rpnet_twList"></ul>
</div>

You can also add the div ids above to your CSS file if you want to modify the look and feel. That's it. The widget will appear on your website and stream multiple accounts.