Motorola Droid users might miss WiFi because it is missing in this update. Few lines from my droid world:
Disclaimer: At this time the kernel has been changed to protect the original source, (you loose wifi) The original file has everything working at this point in time.
Anyways, most of the users will surely be happy with this update, I am sure that there will be more updates coming soon. For now, enjoy the power of Android 2.2.