The new iOS was previewed at Apple's WWDC developer conference earlier this month, but running on the iPhone.
In addition to the bug fixes, the iOS 7 beta 2 now includes the Voice Memos app (which was oddly lacking from the first beta), new voice options for Siri, a refreshed look for the Reminders app, and the introduction of avatars in group message conversations.
The updated beta is available only to registered Apple developers at Apple’s iOS developer portal. Registered developers can also update devices already running beta 1 via an over-the-air update.
The full verison of iOS 7 available to the public is slated to be available this fall.