Don't believe everything you hear about iOS 5. On beta 7, I have 1 app out of 96 that crashes when I try to do something. That's not to say everything is iOS 5 compatible, but I'd say that's pretty good. Also, the OS is extremely stable. Aside from some music app issues (which are stated in the release notes), I really haven't had any problems.
Alli is right, though. TestFlight is a great way to test apps, and it's free. PM me if you'd like, I'd be glad to help you out.