As Apple prepares for its official iOS 5 launch in the fall (likely in September), the company has unleashed their latest iOS beta as on over-the-air update. This over the air process will only work for those running iOS 5 beta 3. Apple warns that doing an OTA update will delete your photos and will require a physical re-sync:

NEW: If you are doing a OTA software update from beta 3 to beta 4, you will need to re-sync your photos with iTunes.

iOS 5 also includes all new notifications with Notification Center, iMessages, Newsstand, and more. OTA updates will come over 3G, as we revealed a few weeks ago.

Update: As expected, it works over 3G (on Verizon!!!) Video below: