If the rental evidence we posted about earlier isn't enough, iPhone hacker extraordinaire Pumpkin has discovered evidence that we may soon see core persistence. TUAW wonders if this is possibly for Safari. Persistence refers to data that gets stored between sessions, similar to the way that Google Gears. This allows web apps to function off-line, when you are not connected to EDGE or Wifi, as well as online, when you are. Like GoogleGears, this mystery "CP" class (from the iPhone's AppSupport framework) relies on SQL databases to store and retrieve data.
So is this firm, hard evidence? No. Is it suggestive? Definitely.
Update: Webkit Persistence. Thanks Robert Mohns.