Much as I admire the well rounded user experience on an iPhone (leaving notifications aside), there are some kinds of innovation that simply aren’t possible on the iPhone today, as it doesn’t let developers hook in deeply enough. One example is the games discovery app recently released by our portfolio company Heyzap. Once you install the Heyzap app, it notices when you launch game apps and gives you an opportunity to “check in." Checking in broadcasts your gameplay to the Heyzap network and ...