Microsoft has launched a new website aiming to be a dashboard for Windows 10 Insiders designed to keep them up to date with the various Preview builds available for PC, Server, IoT, and SDKs as well as ISO images.
The information at Flight Hub should help Insiders know which build is in which ring and what features are in each build. The links provided link to the blog posts which routinely offer a changelog for each build when announced.
The site is expected to be further expanded and Dona Sarkar has said on twitter that it will eventually be integrated into the Insider website and into applications also.
The site can be found here.