Apple is pushing out build 9a5248d of iOS 5 to its developers. The second iOS 5 beta adds several new features, notably Wi-Fi syncing. The new feature will allow iPhone and iPad owners to sync with paired devices on the same network without physically connecting the two with a cable.
The release also includes the ability to receive over-the-air (OTA) updates, although no such updates have yet been released. Other changes include the look of notifications, the option to backup to iCloud or a computer, general speed improvements and several bug fixes.