Here’s the video of JailBreakMe on an iPhone 3G:
Here’s the video of JailBreakMe on an iPhone 4 (faster!)
Feel free to ask some questions in the comments. And yes, FaceTime still works.
Update: We’ve been told by Chronic Dev-Team that FaceTime and MMS may not work properly on some devices. To fix, do a fresh restore and re-jailbreak — that may do the trick. Let us know.
Update 2x: We’ve installed the jailbreak on 4 iPhone 4s and both FaceTime and MMS still work flawlessly on all devices.
Update 3x: One of our devices lost FaceTime and MMS after restarting.