Mhmm, it voids the waranty but it’s well worth it. I could’t have waited for the SDK to come out… The 3rd party apps are quite remarkable, I wouldn’t say I know exactly what happens when you restore your iPod touch in iTunes…but I’m guessing it will overwright installer.app, thus hiding that you voided your warranty. Besides that, installer.app is amazing, I’m posting this on my iPod touch right now!