SpriteBatch converted. It's an extended Group and Batch merged and works amazingly :) Ported over the maggots demo to test and wow!

labs/code/004 maggot batch.js

@@ -0,0 +1,62 @@
+
+var game = new Phaser.Game(800, 600, Phaser.AUTO, 'phaser-example', { preload: preload, create: create, update: update });
+
+function preload() {
+
+    game.load.image('maggot', 'assets/sprites/maggot.png');
+
+}
+
+var batch;
+var dudeBoundsPadding = 100;
+var dudeBounds = new Phaser.Rectangle(-dudeBoundsPadding, -dudeBoundsPadding, 800 + dudeBoundsPadding * 2, 600 + dudeBoundsPadding * 2);
+var tick = 0;
+
+function create() {
+
+	batch = game.add.spriteBatch();
+
+	var total = (game.renderType === Phaser.WEBGL) ? 10000 : 100;
+
+	for (var i = 0; i < total; i++)
+	{
+		var dude = batch.create(game.world.randomX, game.world.randomY, 'maggot');
+
+		dude.anchor.set(0.5);
+		dude.scale.set(0.8 + Math.random() * 0.3);
+		dude.direction = Math.random() * Math.PI * 2;
+		dude.turningSpeed = Math.random() - 0.8;
+		dude.speed = (2 + Math.random() * 2) * 0.2;	
+		dude.offset = Math.random() * 100;
+	}
+
+}
+
+function update() {
+
+	batch.forEach(updateMaggot, this, false);
+
+	tick += 0.1;
+
+}
+
+function updateMaggot(dude) {
+
+	dude.scale.y = 0.95 + Math.sin(tick + dude.offset) * 0.05
+	dude.direction += dude.turningSpeed * 0.01;
+	dude.position.x += Math.sin(dude.direction) * (dude.speed * dude.scale.y);
+	dude.position.y += Math.cos(dude.direction) * (dude.speed * dude.scale.y);
+	dude.rotation = -dude.direction + Math.PI;
+
+	// wrap the dudes by testing their bounds..
+	if (dude.position.x < dudeBounds.x)
+		dude.position.x += dudeBounds.width;
+	else if (dude.position.x > dudeBounds.x + dudeBounds.width)
+		dude.position.x -= dudeBounds.width;
+
+	if (dude.position.y < dudeBounds.y)
+		dude.position.y += dudeBounds.height;
+	else if (dude.position.y > dudeBounds.y + dudeBounds.height)
+		dude.position.y -= dudeBounds.height;
+
+}