Integration of Google Maps with N number of coordinates mapped to a Letter pin Sprite. This code killed me for days before I got it right. Offering it up to anyone who can use it. Support neither offered nor implied. YMMV.

gistfile1.js

var pin_sprite = '{"A":{"x":0,"y":0},"B":{"x":0,"y":84},"C":{"x":0,"y":168},"D":{"x":0,"y":252},"E":{"x":0,"y":336},"F":{"x":0,"y":420},"G":{"x":0,"y":504},"H":{"x":0,"y":588},"I":{"x":0,"y":672},"J":{"x":0,"y":756},"K":{"x":0,"y":840},"L":{"x":0,"y":924},"M":{"x":0,"y":1008},"N":{"x":0,"y":1092},"O":{"x":0,"y":1176},"P":{"x":0,"y":1260},"Q":{"x":0,"y":1344},"R":{"x":0,"y":1428},"S":{"x":0,"y":1512},"T":{"x":0,"y":1596},"U":{"x":0,"y":1680},"V":{"x":0,"y":1764},"W":{"x":0,"y":1848},"X":{"x":0,"y":1932},"Y":{"x":70,"y":0},"Z":{"x":70,"y":84}}';

pin_sprite = jQuery.parseJSON(pin_sprite);
function initialize() {
	var mapOptions = {
		zoom: 10,
		center: new google.maps.LatLng(0,0),
		mapTypeId: google.maps.MapTypeId.ROADMAP
	};
	var map = new google.maps.Map(document.getElementById("map_canvas"), mapOptions);
	setMarkers(map, offices);
}
var bounds = new google.maps.LatLngBounds();
bounds.getCenter();

var offices = [
	['Sheraton Inner Harbor', 39.28585, -76.61311, 'C' ],
	['Peabody Court Hotel', 39.29721, -76.61712, 'G' ],
	['W Hotel DC',38.90098,-77.02858, 'L']
];

function setMarkers(map, locations) {

	for (var i = 0; i < locations.length; i++) {
		var office = locations[i];
		var originx = pin_sprite[office['3']].x;
		var originy = pin_sprite[office['3']].y;
		var image = {
			url: 'http://f.cl.ly/items/2H442l3B0M3u213X1k2t/gmaps-pins.png',
			size: new google.maps.Size(20,34),
			origin: new google.maps.Point(originx,originy),
			anchor: new google.maps.Point(0,34)
		};
		var latlng = new google.maps.LatLng(office[1],office[2]);
		var marker = new google.maps.Marker({
			position: latlng,
			icon: image,
			title: office[0],
			map: map
		});

		bounds.extend(latlng);
		map.fitBounds(bounds);
		bounds.getCenter();
	}
}

jQuery(document).ready(function(){
	initialize();
});

Demo: http://aaronbrazell.com/maps.html