iREB running on an iPod Touch 4 // iPhone 4/3GS/iPad/AppleTV2 work too! :)
I forgot. It does work with iPod Touch 2G MC & iPod Touch 3 too.iREB is a tool for Windows® and Mac® that will bypass any errors while restoring to a custom IPSW in iTunes. And SOON for all other Gen´s of iDevices !