I'm sure if it's actually bricked your device (which it appears it hasn't), then a quick visit to apple with proof of your iOS developer status (which you probably don't have) will result in a swap out.
Nope. It doesn't. If you are a developer then you agreed to terms that you can't get service at the Apple Store but have to go through special developer support. My guess is so that those units get priority exams via being shipped directly to the engineers and not first to some sorting warehouse with all the other returns. When they are swapped (which is very rare)
Anyone what walks into a store with a device on developer preview iOS or OS X is turned away unless it is obvious hardware that can't possibly be software. Which basically means cracked glass or dunked in water.