I work for a web development company and we have recently purchased some iPads to lend to customers as promotional tools.
As many idevice users will know one of the options is to add your favourite websites to your home screen so you can access them in an app like fashion.
Anyway while setting up these iPads I stumbled across a way to VERY EASILY give your website an app style logo that will appear on when somebody bookmarks your site to their home page.
Create a 72 x 72 .png image called apple-touch-logo.png in the root directory of the site and the idevice will do the rest for you.
Just thought it would be cool if pb looked good on my home screen and wouldn't take anybody very long to scale an appropriate logo down.