Hallahan On Tech: Interactive resume, blog and portfolio by Christopher Hallahan

I just found a great article on adding an iPhone/iPod Touch optimized favicon to a web site.  The icon appears on the device's home screen if a user were to add your site as a favorite (otherwise it just appears as an ugly screenshot of the site).  This article provides a Photoshop template for creating the icon.  It is basically a 57x57px PNG.  Save the transparent PNG to your web site's home directory under the name 'apple-touch-icon.png' and you're ready to go.