I originally put this together as a way to show my mom my Instagram photos without UI clutter or other things that might confuse her. I found browsing tags and locations in this format so fun that I decided to build a bit more functionality around it, while still attempting to keep things simple.
I'm trying to do just that with a project I started a few days ago called Khaki. It's a bit of a learning exercise and quite early, but you might find it useful in a month or two.
Go to your profile and swipe left on a wall post and observe the "Remove" button and its animation. Now go to the bottom of your wall, and tap on the "See more posts..." cell. Notice that the activity indicator is an animated GIF. Open the app frequently and you'll see certain elements in the UI automatically changing without downloading an update. Or check out m.facebook.com and play around with the news feed that is identical to the one in the iPhone app.
Granted, there are other approaches you can take to get this behavior, but I'm not sure why you would. My impression is that they're using HTML5 in these areas.
The new LinkedIn and OkCupid apps are primarily HTML5 based. Not quite the same, but every new release of the Facebook app seems to have more of its existing views replaced by HTML5 counterparts.
I probably made a mistake when estimating this. I exported 21 tiles to MBTiles at 429KB, and extrapolated based on the 5.7 billion tiles it would take to do D.C. at 13-16.
I'm still waiting for a larger job to complete, so I don't have a sense of the file size there.
Edit: Got it. The default export is the entire world. Whoops.
TileMill doesn't seem particularly well suited for that either. I did a rough calculation and it looks like getting a usable map of Washington D.C. would run several hundred gigabytes. I'm wondering if the only way to do something like this realistically on a mobile device is to move the rendering to the client.
Really incredible work. Is there anything we can do to speed up exporting, short of manually parallelizing across multiple computers? Distributed export might be a nice feature.