Seems people are looking for reference information for the iPad and iPhone – iPad and iPhone use Safari and are discussed with details in the Safari documentation. http://developer.apple.com/safari/library/navigation/index.html Webkit is the engine http://webkit.org/ but it is on going with nightly builds. To see how your page will look on the iPad download Safari brower and disable flash.
http://ipadpeek.com/ is suppose to show you what a site will look like but it shows flash and the iPad does not! Ooops.
It is called smokescreen – Details are on Touch Review