Earlier today we reported on a revolutionary new way to jailbreak your iPhone, iPad, or other iOS 4.0.1 device. JailbreakMe is the world's first browser-based jailbreaking utility. No messing around with complicated downloads or long, involved processes. You just visit the website and let it take things from there. (Please note that the JailbreakMe servers are taking a pounding right now.) No fuss, no muss.
So why should you invest in jailbreaking your iPhone or iPad? For one thing, you'll gain access to the Cydia app market, which is loaded with all manner of awesome apps that you can't get on the App Store. For example, there's dTunes, a torrenting app that allows you to download on the go, even over 3G. Then there is Cylay, a security app that allows you to keep your phone safe even without MobileMe.
One of the most useful Cydia apps is SBSettings, which is essentially a widget that gives you direct, on-screen control of settings like brightneess, WiFi, 3G, etc. For simple elegance, QuickLock can't be beat. It allows you to make your gadget sleep with one touch.
If you want to take the plunge and jailbreak your iGadget, visit the JailbreakMe website. This is fully reversible, but it does void the warranty.
You also can now use FaceTime over 3G on your jailbroken iPhone 4.