Beyond the usual expected bug fixes and subtle visual changes, iOS 7 beta 2 includes a range of more notable updates. These include the addition of the Voice Memos app (which was oddly lacking from the first beta), new voice options for Siri, a refreshed look for the Reminders app, along with the introduction of avatars in group message conversations.
The most notable thing here is that unlike previous iOS betas, Apple is making big changes this late in the game; it’s unchartered territory, which is exciting. Although I don’t think functionality like inter-app communication or default app selection will be introduced, I’m still holding out hope for actionable notifications, which were shown in OS X Mavericks. iPad support however, is the next logical step in this process.