I had been waiting for the "untethered" JB for 4.2.1 on Windows/ (for what seems like a long time?) I didn't upgrade from 4.1. IOS4.0 made my iP3G almost unusable, so I waited until I knew a JB was near before buying a iP4. Now that its here, I had to go back to Apple's web page to refresh myself on the new features added in 4.2.1. To be honest, most are useless/ unimportant to me? Am I missing something? I already use an app/ service called Cylay that will help me find/ wipe my phone if needed... I've never felt a need to print something from my phone and I don't own or plan to by an Apple TV so "Airplay" doesn't interest me. The other tweaks seemed pretty minor too... New Text "tones", changing fonts in Notes? Maybe I'll just wait for 4.3, though MyWi already covers the rumored WiFi hot spot addition? My phone is pretty stable and I'm happy with it now, so for me, for now..."If it ain't broke, don't fix it."