Apple says, the code
<meta name="apple-mobile-web-app-capable" content="yes">
is supposed to make the the web app full screen from iPhone OS 2.1 and later. (Source: http://developer.apple.com/safari/library/documentation/AppleApplications/Reference/SafariHTMLRef/Articles/MetaTags.html#//apple_ref/doc/uid/TP40008193-SW3 )
But it doesn't seem to work.
Is there a way of hiding the title/location bar within Safari in an iPad WebApp?