The iPhone 4 and iPad 2 updates are almost breaking 700 MB for the latest 0.0.1 revision. Obviously, that's not going to work for OTA upgrades. However, the re

The iPhone 4 and iPad 2 updates are almost breaking 700 MB for the latest 0.0.1 revision. Obviously, that's not going to work for OTA upgrades. However, the requirements for OTA updates are significantly less than for these standalone files that iTunes uses. Right now, Apple has to include the entire system software partition in the file, since it's used for upgrading from any version -- even back to the ancient iPhone 1.0 -- as well as being used for updates. With OTA updates, though, they don't have that restriction: you can't restore a device with them, and you can't use them on a device that's not reasonably current. Instead, just including what's changed (which usually isn't particularly much) is now possible, and likely the route they would take if they choose to support OTA updates.