While browsing the internet to find some information about my iPhone 3G, i came accross this site:
http://www.isharephone.com/
It's a company that developed a SharePoint application that will be able to display the data of your SharePoint intranet on the iPhone, using the iPhone interface. In addition to the iPhone application, you will need a iSharePhone server that is able to communicate with the SharePoint site and serves your iPhone with the content:
source: http://www.bloggix.com/blogs/microsoft/archive/2009/02/03/access-your-sharepoint-intranet-portal-directly-from-your-iphone-interface.aspx