I recently added the BN forums as a shortcut on my iphone home screen. Normally the icon for webpages on the iphone is just a snapshot of the webpage, except otherwise set by the webmasters. This is like the hop grenade icon next to the URL in the browser on my computer. For instance, my digg.com bookmark on my iphone home screen doesn't have a picture of the webpage, but the digg guy with shovel icon. I think this is called the "webclip icon". I thought it would be killer to set up BN pages to have the hop grenade icon show up for iphone users. I would love to see the hop grenade on my homescreen!
Here is a link describing how to do this: http://vjarmy.com/archives/2008/01/howto_iphone_webclip_icons.php