A snippet taken from BostonGlobe.com for a proper hiding of the address bar in crappy webkit browsers as mine in HTC Desire :p

hide-address-bar-webkit

//Thx to Ethan Marcotte, anyway
//scroll to top, hide address bar on mobile devices - 1 for android, 0 for the rest
if( !location.hash ){
	
	//scroll to top
	window.scrollTo( 0, 1 );
	var scrollTop = 1,
		getScrollTop = function(){
			return "scrollTop" in doc.body ? doc.body.scrollTop : 1;
		};
		
	
	//reset to 0 on bodyready, if needed
	globe.bodyready(function(){
		var scrollTop = getScrollTop();
		window.scrollTo( 0, scrollTop === 1 ? 0 : 1 );
	});
	
	window.onload = function(){
		setTimeout(function(){
			//reset to hide addr bar at onload
			if( getScrollTop() < 20 ) {
				window.scrollTo( 0, scrollTop === 1 ? 0 : 1 );
			}
		}, 0);
	};
}