Apple has seeded the iOS 7 beta 3 firmware to developers this morning, marking exactly two weeks since it shipped iOS 7 beta 2. If you are a developer you will be able to download iOS 7 beta 3 (build 11A4414e), which rings in at just over 200MB, over-the-air (OTA) or of course through the iOS Development Center.
Apple typically releases new beta versions of iOS at 2-3 week intervals so you can likely expect the release of iOS 7 beta 4 as soon as July 22nd.
So far early adopters of iOS 7 beta 3 have told us that iOS 7 beta 3 is faster and more reliable (obviously), includes new fonts, new animations and other subtle changes to make iOS 7 feel more polished. If you notice anything significant that has changed in iOS 7 beta 3 be sure to let us know in the comments.