We’re diving into the iOS 7 beta, and plan to have a release available in our alpha channel shortly. Xamarin is unique among cross-platform development tools in offering timely support for new iOS versions. We have issued same-day Xamarin.iOS releases for the last several major iOS updates, a tradition that intend to continue with iOS 7.
This is good news. One of the concerns with using third-party development frameworks is that you might end up writing to a kind of lowest-common-denominator set of APIs that the framework can deliver cross-platform. It's great that the Xamarin team seem determined not to let that happen.