Yesterday, TechCrunch’s MG Siegler wrote about an unreleased Facebook photo app for the iPhone. Today, he’s reporting that Facebook is working on a super-ambitious platform for Mobile Safari on the iPhone and iPad–one that uses HTML5 to deliver the sort of experience usually associated with native iOS apps. He doesn’t have any real details, but it could be cool, and would explain Mark Zuckerberg’s famous disinterest in doing a Facebook app for the iPad.
There are some nifty browser-based mobile apps out there–Google’s Gmail for phones and tablets comes to mind. But there hasn’t been a truly killer app yet of the sort that leaves millions of people thinking that Web apps rather than local apps are the wave of the future. If Facebook is at least trying to pull off something like that, it’s exciting news.