Developers, get your [REDACTED] on.
iOS 5 beta 1 is now available for download from Apple's developer site. You must be a paid $99/year developer to gain access to this beta. Sign in with your dev credentials to gain access.
The beta is, as always, released under the terms of Apple's NDA. For that reason, exploration of new APIs and features is left as an exercise for the reader.
To access the new beta, you must sign an updated developer agreement. The site is a bit glitchy right now so be patient.
Happy developing everyone!