Beta testing is now available on appstore.

You can now have beta testing for your iOS app. The new beta testing supports up to 1000 devices.
You need to upload your app to itunesconnect for beat testing similarly you upload an app to appstore. Then you can send the app link to users or testers. It is simple and convenient. It also allows small enterprise to upload their app using developer program. It will eventually save $100 per year to small organization having upto 1000 target users only. For a good product it's always good to have alpha and beta testing versions before the final launch. This way you can do load testing, get more feedback and reviews. And it will increase your chances to have a better and bug free final product.