It looks like we're going to get what everyone's been waiting to get their hands on earlier than expected. A badly timed blog post (now deleted) today on the Windows Hardware and Driver Developer Blog pinned the release date of the next preview of Windows for May 31st.
The post was written by Chuck Chan, Corporate Vice President of the Windows Development team on a new blog called the "Windows Hardware and Driver Developer Blog" this morning. He says that the "Release Preview" has been "made available today" and then signs the date and his name at the end of the post as "Chuck Chan, May 31st."
More and screenshot at source: Neowin.net