This is very cool. Skala Preview says it offers “The fastest way to send pixel perfect, color-perfect design previews from your Mac to your iPhone or iPad.” Here’s the neat bit:

If you’re using Photoshop CS5 12.0.4 or newer, Skala Preview can preview your canvas as you edit. No saving, no keyboard shortcuts, just lossless previews in realtime. It is the absolute fastest way to preview a design mock up on an iOS device.

I’ve just given it a try, and dang if it doesn’t work like a champ. Nice going, guys!