What can the accidental early adopter expect for their trouble? How about account information for the App Catalog (a sign of paid apps to come), a Select All option in the browser's edit menu, and some changes in GPS location services. In addition to all this inadvertent newness, the update is said to have "much improved (zoom animation)" and a number of "little tweaks throughout." Sadly, as of this writing the gang at Palm seem to have plugged the leak. But chin up, little ones -- we're sure an official release must be imminent.
HP Pre 3
HP webOS 3.0