The iOS 5.1 beta 1 SDK is now available for download by paid devs at the iOS developer site. Sign in with your developer credentials to gain access to the updated SDK. You will need to download and install firmware via iTunes and cannot use over-the-air updating for this initial release.
Because it cannot be said too often, make sure you read any release notes on-site. For everyone intoxicated by new technologies that might allow you to update using other means, I cannot strongly encourage you enough to go to the site and read the release notes. This hint goes out especially to those of you who are not primarily developers but how have purchased dev accounts to stay current on the technology.
Installation alerts appear in a big yellow box on the
