Windows Phone 8.1 has been released to developers this morning! If you are a Windows Phone developer you can now start to stream the download. Joe Belfiore has also provided notification via twitter:
— joebelfiore (@joebelfiore) April 14, 2014
Microsoft is right on time with this release based on the promised timeframes made at Build.
Get ready to download and test Cortana (U.S only), skinned tiles and a revised notification center.